Document:

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                                                                     EXHIBIT 4.2

        THIS WARRANT HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933,
AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS AND MAY NOT BE SOLD,
TRANSFERRED, ASSIGNED, PLEDGED, OFFERED OR OTHERWISE DISPOSED OF EXCEPT PURSUANT
TO AN EFFECTIVE REGISTRATION STATEMENT LINDER THE APPLICABLE SECURITIES LAWS OR
AN OPINION OF COUNSEL ACCEPTABLE TO THE COMPANY STATING THAT SUCH REGISTRATION
IS NOT REQUIRED.

        SUBJECT TO THE PROVISIONS OF SECTION 10 HEREOF, THIS WARRANT SHALL
BECOME VOID AFTER 5:00 P.M. EASTERN TIME ON OCTOBER 11, 2006 ("EXPIRATION
DATE").

                              VISIONICS CORPORATION

                      WARRANT TO PURCHASE 36,036 SHARES OF
             COMMON STOCK, $.01 PAR VALUE PER SHARE ("COMMON STOCK")

        For VALUE RECEIVED, Morgan Keegan & Company, Inc. ("Warrantholder"), is
entitled to purchase, subject to the provisions of this Warrant, from Visionics
Corporation, a Delaware corporation ("Company"), at any time not later than 5:00
P.M., Eastern time, on the Expiration Date, at an exercise price per share equal
to $16.86 (the exercise price in effect being herein called the "Warrant
Price"), 36,036 shares ("Warrant Shares") of Common Stock. The number of Warrant
Shares purchasable upon exercise of this Warrant and the Warrant Price shall be
subject to adjustment from time to time as described herein.

        Section 1. Registration. The Company shall maintain books for the
transfer and registration of the Warrant. Upon the initial issuance of the
Warrant, the Company shall issue and register the Warrant in the name of the
Warrantholder.

        Section 2. Transfers. As provided herein, this Warrant may be
transferred only pursuant to a registration statement filed under the Securities
Act of 1933, as amended ("Securities Act") or an exemption from such
registration. Subject to such restrictions, the Company shall transfer this
Warrant from time to time upon the books to be maintained by the Company for
that purpose, upon surrender thereof for transfer properly endorsed or
accompanied by appropriate instructions for transfer and such other documents as
may be reasonably required by the Company to establish that such transfer is
being made in accordance with the terms hereof, and a new Warrant shall be
issued to the transferee and the surrendered Warrant shall be canceled by the
Company.

        Section 3. Exercise of Warrant. Subject to the provisions hereof, the
Warrantholder may exercise this Warrant in whole or in part at any time upon:
surrender of the Warrant, together with delivery of the duly executed Warrant
exercise form attached hereto as Appendix A (the "Exercise Agreement") and
payment by cash,

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certified check or wire transfer of funds (or by cashless exercise as provided
below) for the Warrant Price for that number of Warrant Shares then being
purchased, to the Company during normal business hours on any business day at
the Company's principal executive offices (or such other office or agency of the
Company as it may designate by notice to the holder hereof). The Warrant Shares
so purchased shall be deemed to be issued to the holder hereof or such holder's
designee, as the record owner of such shares, as of the close of business on the
date on which this Warrant shall have been surrendered (or evidence of loss,
theft or destruction thereof and security or indemnity satisfactory to the
Company shall have been provided to the Company), the Warrant Price shall have
been paid and the completed Exercise Agreement shall have been delivered.
Certificates for the Warrant Shares so purchased, representing the aggregate
number of shares specified in the Exercise Agreement, shall be delivered to the
holder hereof within a reasonable time, not exceeding seven (7) business days,
after this Warrant shall have been so exercised. The certificates so delivered
shall be in such denominations as may be requested by the holder hereof and
shall be registered in the name of such holder or such other name as shall be
designated by such holder. If this Warrant shall have been exercised only in
part, then, unless this Warrant has expired, the Company shall, at its expense,
at the time of delivery of such certificates, deliver to the holder a new
Warrant representing the number of shares with respect to which this Warrant
shall not then have been exercised.

        Each exercise hereof shall constitute the representation and warranty of
the Warrantholder to the Company that the representations and warranties
contained in Article 5 of the Purchase Agreement (as defined below) are true and
correct in all material respects with respect to the Warrantholder as of the
time of such exercise.

        Section 4. Compliance with the Securities Act of 1933. The Company may
cause the legend set forth on the first page of this Warrant to be set forth on
each Warrant or similar legend on any security issued or issuable upon exercise
of this Warrant, unless counsel for the Company is of the opinion as to any such
security that such legend is unnecessary.

        Section 5. Payment of Taxes. The Company will pay any documentary stamp
taxes attributable to the initial issuance of Warrant Shares issuable upon the
exercise of the Warrant; provided, however, that the Company shall not be
required to pay any tax or taxes which may be payable in respect of any transfer
involved in the issuance or delivery of any certificates for Warrant Shares in a
name other than that of the registered holder of this Warrant, and in such case,
the Company shall not be required to issue or deliver any certificate for
Warrant Shares or any Warrant until the person requesting the same has paid to
the Company the amount of such tax or has established to the Company's
reasonable satisfaction that such tax has been paid. The holder shall be
responsible for income taxes due under federal, state or other law, if any such
tax is due.

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        Section 6. Mutilated or Missing Warrants. In case this Warrant shall be
mutilated, lost, stolen, or destroyed, the Company shall issue in exchange and
substitution of and upon cancellation of the mutilated Warrant, or in lieu of
and substitution for the Warrant lost, stolen or destroyed, a new Warrant of
like tenor and for the purchase of a like number of Warrant Shares, but only
upon receipt of evidence reasonably satisfactory to the Company of such loss,
theft or destruction of the Warrant, and with respect to a lost, stolen or
destroyed Warrant, reasonable indemnity or bond with respect thereto, if
requested by the Company.

        Section 7. Reservation of Common Stock. The Company hereby represents
and warrants that there have been reserved, and the Company shall at all
applicable times keep reserved until issued (if necessary) as contemplated by
this Section 7, out of the authorized and unissued Common Stock, sufficient
shares to provide for the exercise of the rights of purchase represented by the
Warrant. The Company agrees that all Warrant Shares issued upon exercise of the
Warrant shall be, at the time of delivery of the certificates for such Warrant
Shares, duly authorized, validly issued, fully paid and non-assessable shares of
Common Stock of the Company.

        Section 8. Adjustments. Subject and pursuant to the provisions of this
Section 8, the Warrant Price and number of Warrant Shares subject to this
Warrant shall be subject to adjustment from time to time as set forth
hereinafter.

               (a) If the Company shall at any time or from time to time while
the Warrant is outstanding, pay a dividend or make a distribution on its Common
Stock in shares of Common Stock, subdivide its outstanding shares of Common
Stock into a greater number of shares or combine its outstanding shares of
Common Stock into a smaller number of shares or issue by reclassification of its
outstanding shares of Common Stock any shares of its capital stock (including
any such reclassification in connection with a consolidation or merger in which
the Company is the continuing corporation), then the number of Warrant Shares
purchasable upon exercise of the Warrant and the Warrant Price in effect
immediately prior to the date upon which such change shall become effective,
shall be adjusted by the Company so that the Warrantholder thereafter exercising
the Warrant shall be entitled to receive the number of shares of Common Stock or
other capital stock which the Warrantholder would have received if the Warrant
had been exercised immediately prior to such event upon payment of a Warrant
Price that has been adjusted to reflect a fair allocation of the economics of
such event to the Warrantholder. Such adjustments shall be made successively
whenever any event listed above shall occur.

               (b) If any capital reorganization, reclassification of the
capital stock of the Company, consolidation or merger of the Company with
another corporation in which the Company is not the survivor, or sale, transfer
or other disposition of all or substantially all of the Company's assets to
another corporation shall be effected, then, as

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a condition of such reorganization, reclassification, consolidation, merger,
sale, transfer or other disposition, lawful and adequate provision shall be made
whereby each Warrantholder shall thereafter have the right to purchase and
receive upon the basis and upon the terms and conditions herein specified and in
lieu of the Warrant Shares immediately theretofore issuable upon exercise of the
Warrant, such shares of stock, securities or assets as would have been issuable
or payable with respect to or in exchange for a number of Warrant Shares equal
to the number of Warrant Shares immediately theretofore issuable upon exercise
of the Warrant, had such reorganization, reclassification, consolidation,
merger, sale, transfer or other disposition not taken place, and in any such
case appropriate provision shall be made with respect to the rights and
interests of each Warrantholder to the end that the provisions hereof
(including, without limitation, provision for adjustment of the Warrant Price)
shall thereafter be applicable, as nearly equivalent as may be practicable in
relation to any shares of stock, securities or properties thereafter deliverable
upon the exercise thereof The Company shall not effect any such consolidation,
merger, sale, transfer or other disposition unless prior to or simultaneously
with the consummation thereof the successor corporation (if other than the
Company) resulting from such consolidation or merger, or the corporation
purchasing or otherwise acquiring such assets or other appropriate corporation
or entity shall assume the obligation to deliver to the holder of the Warrant
such shares of stock, securities or assets as, in accordance with the foregoing
provisions, such holder may be entitled to purchase, and the other obligations
under this Warrant. The provisions of this paragraph (b) shall similarly apply
to successive reorganizations, reclassifications, consolidations, mergers,
sales, transfers or other dispositions.

               (c) In case the Company shall fix a payment date for the making
of a distribution to all holders of Common Stock (including any such
distribution made in connection with a consolidation or merger in which the
Company is the continuing corporation) of evidences of indebtedness or assets
(other than cash dividends or cash distributions payable out of consolidated
earnings or earned surplus or dividends or distributions referred to in Section
8(a)), or subscription rights or warrants, the Warrant Price to be in effect
after such payment date shall be determined by multiplying the Warrant Price in
effect immediately prior to such payment date by a fraction, the numerator of
which shall be the total number of shares of Common Stock outstanding multiplied
by the Market Price per share of Common Stock (as defined below), less the fair
market value (as determined by the Company's Board of Directors in good faith)
of said assets or evidences of indebtedness so distributed, or of such
subscription rights or warrants, and the denominator of which shall be the total
number of shares of Common Stock outstanding multiplied by such Market Price per
share of Common Stock. "Market Price" as of a particular date (the "Valuation
Date") shall mean the following: (a) if the Common Stock is then listed on a
national stock exchange, the closing sale price of one share of Common Stock on
such exchange on the last trading day prior to the Valuation Date; (b) if the
Common Stock is then quoted on the Nasdaq National Market ("Nasdaq"), the
closing sale price of one share of Common Stock on Nasdaq on the last

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trading day prior to the Valuation Date or, if no such closing sale price is
available, the average of the high bid and the low sales price quoted on Nasdaq
on the last trading day prior to the Valuation Date; or (c) if the Common Stock
is not then listed on a national stock exchange or quoted on Nasdaq, the fair
market value of one share of Common Stock as of the Valuation Date, which shall
be determined in good faith by the Board of Directors of the Company and the
Warrantholder. The Board of Directors of the Company shall respond promptly, in
writing, to an inquiry by the Warrantholder prior to the exercise hereunder as
to the Market Value of a share of Common Stock as determined by the Board of
Directors of the Company. In the event that the Board of Directors of the
Company and the Warrantholder are unable to agree upon the fair market value in
respect of subpart (c) hereof, the Company and the Warrantholder shall jointly
select an appraiser, who is experienced in such matters. The decision of such
appraiser shall be final and conclusive, and the cost of such appraiser shall be
borne evenly by the Company and the Warrantholder. Such adjustment shall be made
successively whenever such a payment date is fixed.

               (d) For the term of this Warrant, in addition to the provisions
contained above, the Warrant Price shall be subject to adjustment as provided
below. An adjustment to the Warrant Price shall become effective immediately
after the payment date in the case of each dividend or distribution and
immediately after the effective date of each other event which requires an
adjustment.

               (e) In the event that, as a result of an adjustment made pursuant
to Section 8(a), the holder of this Warrant shall become entitled to receive any
shares of capital stock of the Company other than shares of Common Stock, the
number of such other shares so receivable upon exercise of this Warrant shall be
subject thereafter to adjustment from time to time in a manner and on terms as
nearly equivalent as practicable to the provisions with respect to the Warrant
Shares contained in this Warrant.

               (f) Except as provided in subsection (g) hereof, if and whenever
the Company shall issue or sell, or is, in accordance with any of subsections
(f)(1) through (f)(7) hereof, deemed to have issued or sold, any shares of
Common Stock for a consideration per share less than the Warrant Price in effect
immediately prior to the time of such issue or sale, then and in each such case
(a "Trigger Issuance") the then-existing Warrant Price, shall be reduced, as of
the close of business on the effective date of the Trigger Issuance, to a price
determined as follows:

                    Adjusted Warrant Price = (A x B) + D A+C

                                      where

                    "A" equals the number of shares of Common Stock outstanding
(including any Additional Shares of Common Stock (as defined below) immediately
preceding such Trigger Issuance);

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                    "B" equals the Warrant Price in effect immediately preceding
such Trigger Issuance;

                    "C" equals the number of Additional Shares of Common Stock
(as adjusted for stock splits, stock combinations, recapitalizations, and
dividends and the like) issued or deemed issued hereunder as a result of all
Trigger Issuances; and

                    "D" equals the aggregate consideration, if any, received or
deemed to be received by the Company upon such Trigger Issuance.

        For purposes of this subsection (f), "Additional Shares of Common Stock"
shall mean all shares of Common Stock issued by the Company or deemed to be
issued pursuant to this subsection (f), other than Excluded Issuances (as
defined in subsection (g) hereof).

        For purposes of this subsection (f), the following subsections (f)(1) to
(f)(7) shall also be applicable (subject, in each such case, to the provisions
of subsection (g) hereof) and to each other subsection contained in this
subsection (f):

                    (1) Issuance of Rights or Options. In case at any time the
Company shall in any manner grant (directly and not by assumption in a merger or
otherwise) any warrants or other rights to subscribe for or to purchase, or any
options for the purchase of, Common Stock or any stock or security convertible
into or exchangeable for Common Stock (such warrants, rights or options being
called "Options" and such convertible or exchangeable stock or securities being
called "Convertible Securities") whether or not such Options or the right to
convert or exchange any such Convertible Securities are immediately exercisable,
and the price per share for which Common Stock is issuable upon the exercise of
such Options or upon the conversion or exchange of such Convertible Securities
(determined by dividing (i) the sum (which sum shall constitute the applicable
consideration (the "Consideration")) of (x) the total amount, if any, received
or receivable by the Company as consideration for the granting of such Options,
plus (y) the aggregate amount of additional consideration payable to the Company
upon the exercise of all such Options, plus (z), in the case of such Options
which relate to Convertible Securities, the aggregate amount of additional
consideration, if any, payable upon the issue or sale of such Convertible
Securities and upon the conversion or exchange thereof, by (ii) the total
maximum number of shares of Common Stock issuable upon the exercise of such
Options or upon the conversion or exchange of all such Convertible Securities
issuable upon the exercise of such Options) shall be less than the Warrant Price
in effect immediately prior to the time of the granting of such Options, then
the total number of shares of Common Stock issuable upon the exercise of such
Options or upon conversion or exchange of the total amount of such Convertible
Securities issuable upon the exercise of such Options shall be deemed to have
been issued for such price per share as of the date of granting of such Options
or the issuance of such Convertible Securities and thereafter shall be deemed to
be outstanding for purposes of

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adjusting the Warrant Price. Except as otherwise provided in subsection 8(f)(3),
no adjustment of the Warrant Price shall be made upon the actual issue of such
Common Stock or of such Convertible Securities upon exercise of such Options or
upon the actual issue of such Common Stock upon conversion or exchange of such
Convertible Securities.

                    (2) Issuance of Convertible Securities. In case the Company
shall in any manner issue (directly and not by assumption in a merger or
otherwise) or sell any Convertible Securities, whether or not the rights to
exchange or convert any such Convertible Securities are immediately exercisable,
and the price per share for which Common Stock is issuable upon such conversion
or exchange (determined by dividing (i) the sum (which sum shall constitute the
applicable Consideration) of (x) the total amount received or receivable by the
Company as consideration for the issue or sale of such Convertible Securities,
plus (y) the aggregate amount of additional consideration, if any, payable to
the Company upon the conversion or exchange thereof, by (ii) the total number of
shares of Common Stock issuable upon the conversion or exchange of all such
Convertible Securities) shall be less than the Warrant Price in effect
immediately prior to the time of such issue or sale, then the total maximum
number of shares of Common Stock issuable upon conversion or exchange of all
such Convertible Securities shall be deemed to have been issued for such price
per share as of the date of the issue or sale of such Convertible Securities and
thereafter shall be deemed to be outstanding for purposes of adjusting the
Warrant Price, provided that (a) except as otherwise provided in subsection
8(f)(3), no adjustment of the Warrant Price shall be made upon the actual
issuance of such Common Stock upon conversion or exchange of such Convertible
Securities and (b) no further adjustment of the Warrant Price shall be made by
reason of the issue or sale of Convertible Securities upon exercise of any
Options to purchase any such Convertible Securities for which adjustments of the
Warrant Price have been made pursuant to other provisions of this subsection
8(f)(2).

                    (3) Change in Option Price or Conversion Rate. Upon the
happening of any of the following events, namely, if the purchase price provided
for in any Option referred to in subsection 8(f)(1) hereof, the additional
consideration, if any, payable upon the conversion or exchange of any
Convertible Securities referred to in subsections 8(f)(1) or 8(f)(2), or the
rate at which Convertible Securities referred to in subsections 8(f)(1) or
8(f)(2) are convertible into or exchangeable for Common Stock shall change at
any time (including, but not limited to, changes under or by reason of
provisions designed to protect against dilution), the Warrant Price in effect at
the time of such event shall forthwith be readjusted to the Warrant Price which
would have been in effect at such time had such Options or Convertible
Securities still outstanding provided for such changed purchase price,
additional consideration or conversion rate, as the case may be, at the time
initially granted, issued or sold; and on the termination of any such Option or
any such right to convert or exchange such Convertible Securities (including
without limitation upon the redemption or purchase for Consideration of all such

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Convertible Securities by the Company), the Warrant Price then in effect
hereunder shall forthwith be changed to the Warrant Price which would have been
in effect at the time of such termination had such Option or Convertible
Securities, to the extent outstanding immediately prior to such termination,
never been issued.

                    (4) Stock Dividends. Subject to the provisions hereof, in
case the Company shall declare a dividend or make any other distribution upon
any stock of the Company (other than the Common Stock) payable in Common Stock,
Options or Convertible Securities, then any Common Stock, Options or Convertible
Securities, as the case may be, issuable in payment of such dividend or
distribution shall be deemed to have been issued or sold without consideration.

                    (5) Consideration for Stock. In case any shares of Common
Stock, Options or Convertible Securities shall be issued or sold for cash, the
Consideration received therefor shall be deemed to be the net amount received by
the Company therefor, after deduction therefrom of any expenses incurred or any
underwriting commissions or concessions paid or allowed by the Company in
connection therewith. In case any shares of Common Stock, Options or Convertible
Securities shall be issued or sold for a Consideration other than cash, the
amount of the Consideration other than cash received by the Company shall be
deemed to be the fair value of such Consideration as determined in good faith by
the Board of Directors of the Company, after deduction of any expenses incurred
or any underwriting commissions or concessions paid or allowed by the Company in
connection therewith. In case any Options shall be issued in connection with the
issue and sale of other securities of the Company, together comprising one
integral transaction in which no specific consideration is allocated to such
Options by the parties thereto, such Options shall be deemed to have been issued
for such consideration as determined in good faith by the Board of Directors of
the Company.

                    (6) Record Date. In case the Company shall take a record of
the holders of its Common Stock for the purpose of entitling them (i) to receive
a dividend or other distribution payable in Common Stock, Options or Convertible
Securities or (H) to subscribe for or purchase Common Stock, Options or
Convertible Securities, then such record date shall be deemed to be the date of
the issue or sale of the shares of Common Stock deemed to have been issued or
sold upon the declaration of such dividend or the making of such other
distribution or the date of the granting of such right of subscription or
purchase, as the case may be.

                    (7) Treasury Shares. The number of shares of Common Stock
outstanding at any given time shall not include shares owned or held by or for
the account of the Company or any of its wholly-owned subsidiaries, and the
disposition of any such shares shall be considered an issue or sale of Common
Stock for the purpose of this subsection (f).

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                    (g) Anything herein to the contrary notwithstanding, the
Company shall not be required to make any adjustment of the Warrant Price in the
case of the issuance of any of (A) capital stock, Options or Convertible
Securities issued to directors, officers, employees or consultants of the
Company in connection with their service as directors of the Company, their
employment by the Company or their retention as consultants by the Company
pursuant to an equity compensation program approved by the Board of Directors of
the Company or the compensation committee of the Board of Directors of the
Company, (B) sales of shares of Common Stock upon the conversion or exercise of
Options or Convertible Securities issued prior to the date hereof or (C) capital
stock issued as full or partial consideration for a merger or acquisition, or a
strategic allegiance or alliance in which the Company with respect to such
strategic allegiance or alliance issues shares of its equity securities having
an aggregate Fair Market Value (as defined below) of less than $ 10 million,
approved by the Board of Directors of the Company. The "Fair Market Value" of a
security as of a particular date (the "Valuation Date") shall mean the
following: (a) if the security is then listed on a national stock exchange, the
closing sale price of one security on such exchange on the last trading day
prior to the Valuation Date; (b) if the security is then quoted on Nasdaq, the
closing sale price of one security on Nasdaq on the last trading day prior to
the Valuation Date or, if no such closing sale price is available, the average
of the high bid and the low sales price quoted on Nasdaq on the last trading day
prior to the Valuation Date; or (c) if the security is not then listed on a
national stock exchange or quoted on Nasdaq, the fair market value of one
security as of the Valuation Date, shall be determined in good faith by a
nationally selected investment banking firm or other nationally recognized
business appraiser selected by the Board of Directors of the Company. The
decision of such appraiser shall be final and conclusive, and the cost of such
appraiser shall be borne evenly by the Company and the Investors (pro rata in
respect of their ownership of Securities at such time) as such terms are defined
in that certain Purchase Agreement among the Company and the Investors dated
October 5, 2001. An "Excluded Issuance" shall mean each of items (A), (B) and
(C) above.

        Section 9. Fractional Interest. The Company shall not be required to
issue fractions of Warrant Shares upon the exercise of the Warrant. If any
fractional share of Common Stock would, except for the provisions of the first
sentence of this Section 9, be delivered upon such exercise, the Company, in
lieu of delivering such fractional share, shall pay to the exercising holder of
this Warrant an amount in cash equal to the current Fair Market Value of such
fractional share of Common Stock.

        Section 10. Extension of Expiration Date. If the Company fails to cause
any Registration Statement covering Registrable Securities (capitalized terms
used in this section are as defined in the Registration Rights Agreement dated
October 5, 2001) (the "Registration Rights Agreement") to be declared effective
prior to the applicable dates set forth therein, or if any of the events
specified in clause (B) or (C) of Section 2(c) of the Registration Rights
Agreement occurs and the Blackout Period (whether alone, or in

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combination with any other Blackout Period) continues for more than 60 days in
any 12 month period, or for more than a total of 90 days, then the Expiration
Date of this Warrant shall be extended one day for each day beyond the 60-day or
90-day limits, as the case may be, that the Blackout Period continues.

        Section 11. Benefits. Nothing in this Warrant shall be construed to give
any person, firm or corporation (other than the Company and the Warrantholder)
any legal or equitable right, remedy or claim, it being agreed that this Warrant
shall be for the sole and exclusive benefit of the Company and the
Warrantholder.

        Section 12. Notices to Warrantholder. Upon the happening of any event
requiring an adjustment of the Warrant Price, the Company shall promptly give
written notice thereof to the Warrantholder at the address appearing in the
records of the Company, stating the adjusted Warrant Price and the adjusted
number of Warrant Shares resulting from such event and setting forth in
reasonable detail the method of calculation and the facts upon which such
calculation is based. Failure to give such notice to the Warrantholder or any
defect therein shall not affect the legality or validity of the subject
adjustment.

        Section 13. Identity of Transfer Agent. The Transfer Agent for the
Common Stock is Wells Fargo Shareowner Services. Upon the appointment of any
subsequent transfer agent for the Common Stock or other shares of the Company's
capital stock issuable upon the exercise of the rights of purchase represented
by the Warrant, the Company will mail to the Warrantholder a statement setting
forth the name and address of such transfer agent.

        Section 14. Notices. Any notice pursuant hereto to be given or made by
the Warrantholder to or on the Company shall be sufficiently given or made if
sent by certified mail, return receipt requested, postage prepaid, addressed as
follows:

                       Visionics Corporation
                       5600 Rowland Road
                       Minnetonka, Minnesota 55353
                       Attn: Robert Gallagher
                       Fax: (952) 932-7181

or such other address as the Company may specify in writing by notice to the
Warrantholder complying as to delivery with the terms of this Section 14.

        Any notice pursuant hereto to be given or made by the Company to or on
the Warrantholder shall be sufficiently given or made if personally delivered or
if sent by an internationally recognized courier services by overnight service,
to the address set forth on the books of the Company or, as to each of the
Company and the Warrantholder, at such other address as shall be designated by
such party by written notice to the other

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party complying as to delivery with the terms of this Section 14. All such
notices, requests, demands, directions and other communications shall, when sent
by courier be effective one (1) day after delivery to such courier as provided
and addressed as aforesaid.

        Section 15. Registration Rights. The initial holder of this Warrant is
entitled to the benefit of certain registration rights in respect of the Warrant
Share as provided in the Registration Rights Agreement, and any subsequent
holder hereof may be entitled to such rights.

        Section 16. Successors. All the covenants and provisions hereof by or
for the benefit of the Warrantholder shall bind and inure to the benefit of its
respective successors and assigns hereunder.

        Section 17. Governing Law. This Warrant shall be deemed to be a contract
made under the laws of the State of New York, without giving effect to its
conflict of law principles, and for all purposes shall be construed in
accordance with the laws of said State; provided, however, that, insofar as the
Company is incorporated under the laws of the State of Delaware, the General
Corporation Law of the State of Delaware (or any successor statute) shall govern
those matters that apply to the internal governance of the Company.

        Section 18. Cashless Exercise.

               (a) Net Issue Election. Notwithstanding any other provision
contained herein to the contrary, the Warrantholder may elect to receive,
without the payment by the Warrantholder of the aggregate Warrant Price in
respect of the shares of Common Stock to be acquired, shares of Common Stock
equal to the value of this Warrant or any portion hereof by the surrender of
this Warrant (or such portion of this Warrant being so exercised) together with
the Net Issue Election Notice annexed hereto as Appendix B duly executed, at the
office of the Company. Thereupon, the Company shall issue to the Warrantholder
such number of fully paid, validly issued and nonassessable shares of Common
Stock as is computed using the following formula:

                             X = Y (A - B)
                                 ---------
                                     A

                      where

        "X" = the number of shares of Common Stock which the Warrantholder has
then requested be issued to the Warrantholder

        "T"= the total number of shares of Common Stock covered by this Warrant
which the Warrantholder has surrendered at such time for cashless exercise

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        "X"= the "Fair Market Value" of one share of Common Stock as at the time
the net issue election is made

        "B" = the Warrant Price in effect under this Warrant at the time the net
issue election is made.

        Section 19. Call Provision. Notwithstanding any other provision
contained herein to the contrary, in the event that the closing bid price of a
share of Common Stock as traded on Nasdaq (or such other exchange as the Common
Stock may then be listed) exceeds 150% of the Warrant Price for twenty (20)
consecutive trading sessions and all of the Warrant Shares issuable hereunder
are registered pursuant to an effective Registration Statement (as defined in
the Registration Rights Agreement), the Company, upon ten (10) business days
prior written notice (the "Notice Period"), following such twenty (20) day
period, to the Warrantholder, may demand that the Warrantholder exercise its
rights with regard to all Warrant Shares and the Warrantholder must exercise its
rights prior to the expiration of the Notice Period or if such exercise is not
made or if only a partial exercise is made, any and all rights to further
exercise rights to acquire Warrant Shares hereunder shall cease upon the
expiration of the Notice Period.

        Section 20. Amendments and Waivers. This Warrant may be amended only by
a writing signed by the Company and the Warrantholder.

        IN WITNESS WHEREOF, Visionics Corporation has caused this Warrant to be
duly executed, as of the day and year first above written.

                                         VISIONICS CORPORATION

                                         By: /s/ Robert F. Gallagher
                                            ------------------------------------
                                                 Name:  Robert F. Gallagher
                                                 Title:  Chief Financial Officer

                                       12
<PAGE>
                                   APPENDIX A
                              VISIONICS CORPORATION
                              WARRANT EXERCISE FORM

To: Visionics Corporation

        The undersigned hereby irrevocably elects to exercise the right of
purchase represented by the within Warrant ("Warrant") for, and to purchase
thereunder by the payment of the Warrant Price and surrender of the Warrant,
shares of Common Stock ("Warrant Shares") provided for therein, and requests
that certificates for the Warrant Shares be issued as follows:

                                    --------------------------------------------
                                    Name

                                    --------------------------------------------
                                    Address

                                    --------------------------------------------
                                    Address

                                    --------------------------------------------
                                    Federal Tax ID or Social Security No.

        and delivered by

             -  certified mail to the above address, or

             -  electronically (provide DWAC Instructions: or

             -  other (specify:

and, if the number of Warrant Shares shall not be all the Warrant Shares
purchasable upon exercise of the Warrant, that a new Warrant for the balance of
the Warrant Shares purchasable upon exercise of this Warrant be registered in
the name of the undersigned Warrantholder or the undersigned's Assignee as below
indicated and delivered to the address stated below.

        By exercising the rights represented by this Warrant, the undersigned
hereby certifies that, as of the date of exercise of this Warrant, the
representations and warranties contained in Section 5 of the Purchase Agreement
are true and correct in all material respects with respect to the undersigned.

Dated:_____________, ____

                                       13
<PAGE>

Note: The signature must correspond          Signature:
with the name of the registered                        ------------------------
holder as written on the first page
of the Warrant in every particular,             --------------------------------
without alteration or enlargement               Name (please print)
or any change whatever, unless the
Warrant has been assigned.
                                                --------------------------------

                                                --------------------------------
                                                           Address

                                                --------------------------------

                                                --------------------------------
                                                Federal Identification or
                                                Social Security No.:
                                                                    ------------

                                       14
<PAGE>
                                  APPENDIX "B"

                            NET ISSUE ELECTION NOTICE

To: Visionics Corporation

Date:_______________________

        The undersigned hereby elects under Section 18 of this Warrant to
surrender the night to purchase __________ shares of Common Stock pursuant to
this Warrant and hereby requests the issuance of __________ shares of Common
Stock. The certificate(s) for the shares issuable upon such net issue election
shall be issued in the name of the undersigned or as otherwise indicated below.

---------------------------
Signature

---------------------------
Name for Registration

---------------------------
Mailing Address

                                       15<PAGE>
                                                                     EXHIBIT 4.3

        THIS CERTIFICATE AND THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN
REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"),
OR ANY STATE SECURITIES LAW, AND MAY NOT BE SOLD, TRANSFERRED, PLEDGED,
HYPOTHECATED OR OTHERWISE DISPOSED OF UNTIL EITHER (i) A REGISTRATION STATEMENT
UNDER THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS SHALL HAVE BECOME
EFFECTIVE WITH REGARD THERETO, OR (ii) THE CORPORATION SHALL HAVE RECEIVED AN
OPINION OF COUNSEL ACCEPTABLE TO THE CORPORATION AND ITS COUNSEL THAT AN
EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OR APPLICABLE STATE
SECURITIES LAWS IS AVAILABLE IN CONNECTION WITH SUCH OFFER, SALE OR TRANSFER.

                             STOCK PURCHASE WARRANT

                          TO PURCHASE 25,000 SHARES OF

                                 COMMON STOCK OF

                              VISIONICS CORPORATION

        THIS CERTIFIES THAT, for good and valuable consideration, Thomas Pierce,
or its registered assignees, is entitled to subscribe for and purchase from
Visionics Corporation, a Delaware corporation (the "Company"), at any time after
October 24, 2001, to and including October 23, 2006, Twenty Five Thousand
(25,000), fully paid and nonassessable shares of the Common Stock of the Company
at the price of $13.20 per share (the "Warrant Exercise Price"), subject to the
antidilution provisions of this Warrant. The shares which may be acquired upon
exercise of this Warrant are referred to herein as the "Warrant Shares." As used
herein, the term "Holder" means the initial holder, any party who acquires all
or a part of this Warrant as a registered transferee of the initial holder in
accordance with the terms of this Warrant, or any record holder or holders of
the Warrant Shares issued upon exercise, whether in whole or in part, of the
Warrant; the term "Common Stock" means and includes the Company's presently
authorized voting common stock, no par value per share, and shall also include
any capital stock of any class of the Company hereafter authorized which shall
not be limited to a fixed sum or percentage in respect of the rights of the
holders thereof to participate in dividends or in the distribution of assets
upon the voluntary or involuntary liquidation, dissolution, or winding up of the
Company; and the term "Convertible Securities" means any stock or other
securities convertible into, or exchangeable for, Common Stock.

        This Warrant is subject to the following provisions, terms and
conditions:

<PAGE>
        1. Exercise; Transferability.

               (a) The rights represented by this Warrant may be exercised by
the Holder hereof, in whole or in part (but not as to a fractional share of
Common Stock), prior to the expiration of this Warrant by written notice of
exercise (in the form attached hereto) delivered to the Company at the principal
office of the Company and accompanied or preceded by the surrender of this
Warrant and payment of the Warrant Exercise Price for such shares. The Holder
shall then complete and comply with a subscription agreement in the form
requested by the Company.

               (b) Neither this Warrant nor the Warrant Shares may be sold,
assigned, hypothecated, or otherwise transferred other than (i) by will or
pursuant to the operation of law, or (ii) pursuant to Section 8 hereof Further,
this Warrant may not be sold, transferred, assigned, hypothecated or divided
into two or more Warrants of smaller denominations. Other than by operation of
law, there shall be no more than 4 outstanding record holders of this Warrant at
any one time.

        2. Payment of Warrant Exercise Price.

        Payment of the Warrant Exercise Price may be made by cash, certified
check, cashiers check or wire transfer or a combination thereof, at the election
of Holder.

        3. Exchange and Replacement. Subject to Sections I and 8 hereof, this
Warrant is exchangeable upon the surrender hereof by the holder to the Company
at its principal executive office for a new Warrant(s) of like tenor and date
representing in the aggregate the right to purchase the number of Warrant Shares
purchasable hereunder, each of such new Warrant(s) to represent the right to
purchase such number of Warrant Shares (not to exceed the aggregate total number
purchasable hereunder) as shall be designated by the Holder at the time of such
surrender. Upon receipt by the Company of evidence reasonably satisfactory to it
of the loss, theft, destruction, or mutilation of this Warrant, and, in case of
loss, theft or destruction, of indemnity or security reasonably satisfactory to
it, and upon surrender and cancellation of this Warrant, if mutilated, the
Company will make and deliver a new Warrant of like tenor, in lieu of this
Warrant; provided, however, that if the initial Holder shall be such Holder, an
agreement of indemnity by such Holder shall be sufficient for all purposes of
this Section 3. This Warrant shall be promptly canceled by the Company upon the
surrender hereof in connection with any exchange or replacement. The Company
shall pay all expenses (other than stock transfer or income taxes) and other
charges payable in connection with the preparation, execution, and delivery of
Warrant(s) pursuant to this Section 3.

        4. Issuance of the Warrant Shares.

               (a) The Company agrees that the shares of Common Stock purchased
hereby), shall be and are deemed to be issued to the Holder as of the close of
business on

                                       2
<PAGE>
the date on which this Warrant shall have been surrendered, the payment made for
such Warrant Shares as aforesaid and the subscription agreement is returned to
the Company. Subject to the provisions of the next section, certificates for the
Warrant Shares so purchased shall be delivered to the Holder within a reasonable
time, not exceeding 15 business days after the rights represented by this
Warrant shall have been so exercised, such payment surrendered and such
agreement returned and, unless this Warrant has expired, a new Warrant
representing the right to purchase the number of Warrant Shares, if any, with
respect to which this Warrant shall not then have been exercised shall also be
delivered to the Holder within such time.

               (b) Notwithstanding the foregoing, however, the Company shall not
be required to deliver any certificate for Warrant Shares upon exercise of this
Warrant except in accordance with exemptions from the applicable securities
registration requirements or registrations under applicable securities laws.
Nothing herein, however, shall obligate the Company to effect registrations
under federal or state securities laws. If registrations are not in effect and
if exemptions are not available when the Holder seeks to exercise the Warrant,
the Warrant exercise period will be extended, if need be, to prevent the Warrant
from expiring, until such time as either registrations become effective or
exemptions are available, and the Warrant shall then remain exercisable for a
period of at least 30 calendar days from the date the Company delivers to the
Holder written notice of the availability of such registrations or exemptions.
The Holder agrees to execute such documents and make such representations,
warranties, and agreements as may be required solely to comply with the
exemptions relied upon by the Company, or the registrations made, for the
issuance of the Warrant Shares.

        5. Covenants of the Company. The Company covenants and agrees that all
Warrant Shares will, upon issuance, be duly authorized and issued, fully paid,
nonassessable, and free from all taxes (except stock transfer and income taxes),
liens, and charges with respect to the issue thereof The Company further
covenants and agrees that during the period within which the rights represented
by this Warrant may be exercised, the Company will at all times have authorized
and reserved for the purpose of issue or transfer upon exercise of the
subscription rights evidenced by this Warrant a sufficient number of shares of
Common Stock to provide for the exercise of the rights represented by this
Warrant.

        6. Antidilution Adjustment. The provisions of this Warrant are Subject
to as provided in this Section 6.

               (a) The Warrant Exercise Price shall be adjusted from time to
time such that in case the Company shall hereafter:

                    (i) pay any dividends on any class of stock of the Company
payable in Common Stock;

                                       3
<PAGE>
                    (ii) subdivided its then outstanding shares of Common Stock
into a greater number of shares, or

                    (iii) combine outstanding shares of Common Stock, by
reclassification or otherwise;

then, in any such event, the Warrant Exercise Price in effect immediately prior
to such event shall (until adjusted again pursuant hereto) be adjusted
immediately after such event to a price (calculated to the nearest full cent)
determined by dividing (a) the number of shares of Common Stock outstanding
immediately prior to such event, multiplied by the then existing Warrant
Exercise Price, by (b) the total number of shares of Common Stock outstanding
immediately after such event (including the maximum number of shares of Common
Stock issuable in respect of any securities convertible into Common Stock), and
the resulting quotient shall be the adjusted Warrant Exercise Price per share.
An adjustment made pursuant to this Subsection shall become effective
immediately after the record date in the case of a dividend or distribution and
shall become effective immediately after the effective date in the case of a
subdivision, combination or reclassification. If, as a result of an adjustment
made pursuant to this Subsection, the Holder of any Warrant thereafter
surrendered for exercise shall become entitled to receive shares of two or more
classes of capital stock or shares of Common Stock and other capital stock of
the Company, the Company's Board of Directors (whose determination shall be
conclusive) shall determine the allocation of the adjusted Warrant Exercise
Price between or among shares of such classes of capital stock or shares of
Common Stock and other capital stock. All calculations under this Subsection
shall be made to the nearest cent or to the nearest 1/100 of a share, as the
case maybe. In the event that at any time as a result of an adjustment made
pursuant to this Subsection, the holder of any Warrant thereafter surrendered
for exercise shall become entitled to receive any shares of the Company other
than shares of Common Stock, thereafter the Warrant Exercise Price of such other
shares so receivable upon exercise Warrant shall be subject to adjustment from
time to time in a manner and on terms as nearly equivalent as practicable to the
provisions with respect to Common Stock contained in this Section.

               (b) Upon each adjustment of the Warrant Exercise Price pursuant
to Section 6(a) above, the Holder of each Warrant shall thereafter (until
another such adjustment) be entitled to purchase at the adjusted Warrant
Exercise Price the number of shares, calculated to the nearest full share,
obtained by Multiplying the number of shares specified in such Warrant (as
adjusted as a result of all adjustments in the Warrant Exercise Price in effect
prior to such adjustment) by the Warrant Exercise Price in effect prior to such
adjustment and dividing the product so obtained by the adjusted Warrant Exercise
Price.

               (c) In case of any capital reorganization or any reclassification
of the shares of Common Stock of the Company, or any consolidation or merger to
which the

                                       4
<PAGE>
Company is a party other than a merger or consolidation in which the Company is
the continuing corporation, or in case of any sale or conveyance to another
corporation of the property of the Company as ail entirety or substantially as
an entirety, or in the case of any statutory exchange of securities with another
corporation (including any exchange effected in connection with a merger of a
third corporation into the Company), there shall be no adjustment under
Subsection (a) of this Section above but the Holder of each Warrant then
outstanding shall have the light thereafter to convert Such Warrant into the
kind and amount of shares of stock and other securities and property which it
would have owned or have been entitled to receive immediately after such capital
reorganization, reclassification, consolidation, merger, statutory exchange,
sale, or conveyance had such Warrant been converted immediately prior to the
effective dale of such consolidation, merger, statutory exchange, sale, or
conveyance and in any such case, if necessary, appropriate adjustment shall be
made in the application of the provisions set forth in this Section with respect
to the rights and interests thereafter of any Holders of the Warrant, to the end
that the provisions set forth in this Section shall thereafter correspondingly
be made applicable, as nearly as may reasonably be, in relation to any shares of
stock and other securities and property thereafter deliverable on the exercise
of the Warrant. The provisions of this Subsection shall similarly apply to
successive consolidations, mergers, statutory, exchanges, sales or conveyances.
Prior to consummating any such consolidation, merger or sale, the successor
corporation (if other than the Company) resulting from such consolidation or
merger, or the corporation purchasing such assets, shall assume by written
instrument executed and mailed to the registered Holder hereof at the last
address of such Holder appearing on the books of the Company, the obligation to
deliver to such Holder such shares of stock, securities or assets as, in
accordance with the foregoing provisions, such Holder may be entitled to
purchase.

               (d) Upon any adjustment of the Warrant Exercise Price, then, and
in each such case, the Company shall give written notice thereof, by first class
mail, postage prepaid, addressed to the Holder as shown on the books of the
Company, which notice shall state the Warrant Exercise Price resulting from such
adjustment and the increase or decrease, if any, in the number of shares of
Common Stock purchasable at such price upon the exercise of this Warrant,
setting forth in reasonable detail the method of calculation and the facts upon
which such calculation is based.

        7. No Voting Rights. This Warrant shall not entitle the Holder to any
voting rights or other rights as a shareholder of the Company.

        8. Notice of Transfer of Warrant or Resale of the Warrant Shares.

               (a) Subject to the sale, assignment, hypothecation, or other
transfer restrictions set forth in Section 1 hereof, the Holder, by acceptance
hereof, agrees to give 7 days written notice to the Company before transferring
this Warrant or transferring any Warrant Shares of such Holder's intention to do
so, describing briefly the manner of any

                                       5
<PAGE>
proposed transfer. Such notice may be provided in the form of Warrant Assignment
attached hereto. Promptly upon receiving such written notice, the Company shall
present copies thereof to the Company's counsel. If in the reasonable opinion of
such counsel, the proposed transfer may be effected without registration or
qualification (under any federal or state Securities laws), the Company, as
promptly as practicable, shall notify the Holder of such opinion, whereupon the
Holder shall be entitled to transfer this Warrant or to dispose of Warrant
Shares received upon the previous exercise of this Warrant, all in accordance
with the terms of the notice delivered by the Holder to the Company; provided
that an appropriate legend may be endorsed on this Warrant or the certificates
for such Warrant Shares respecting restrictions upon transfer thereof necessary
or advisable in the opinion of counsel and satisfactory to the Company to
prevent further transfer which would be in violation of Section 5 of the
Securities Act of 1933, as amended (the "1933 Act") and applicable state
securities laws; and provided further that the prospective transferee or
purchaser shall execute such documents and make such representations, warranties
and agreements as may be reasonably required solely to comply with the
exemptions relied upon by the Company for the transfer or disposition of the
Warrant or Warrant Shares.

               (b) If in the reasonable opinion of the counsel referred to in
this Section 8, the proposed transfer or disposition of this Warrant or such
Warrant Shares described in the written notice given pursuant to this Section 8
may not be effected without registration or qualification of this Warrant or
such Warrant Shares, the Company shall promptly give written notice thereof to
the Holder, and the Holder will limit its activities in respect to such as, in
the reasonable opinion of such counsel to the Company, are permitted by law.

                                       6
<PAGE>
        9. Fractional Shares. Fractional shares shall not be issued upon the
exercise of this Warrant, but in any case where the Holder would, except for the
provisions of this Section, be entitled under the terms hereof to receive a
fractional share, the Company shall, upon the exercise of this Warrant for the
largest number of whole shares then called for, pay a sum in cash equal to the
sum of (a) the excess, if any, of the Market Price of such fractional share over
the proportional part of the Warrant Exercise Price represented by such
fractional share, plus (b) the proportional part of the Warrant Exercise Price
represented by such fractional share. For purposes of this Section, the term
"Market Price" with respect to shares of Common Stock of any class or series
means the last reported sale price or, if none, the average of the last reported
closing bid and ask prices on any national securities exchange or quoted on the
Nasdaq, or if not listed on a national securities exchange or quoted on Nasdaq,
the average of the last reported closing bid and ask prices as reported by Metro
Data Company, Inc. from quotations by market makers in such Common Stock on the
Minneapolis-St. Paul local over-the-counter sales.

        10. Representations of the Holder.

               (a) The Holder acknowledges and represents that Holder
understands that this Warrant is illiquid and highly speculative, that Holder is
able to bear the economic risk associated with this Warrant, and that Holder
believes that this Warrant is a suitable investment for Holder.

               (b) The Holder acknowledges and represents that Holder has been
given access to full and complete information regarding the Company (including
the opportunity to meet with Company officers and to review such documents as
Holder may have requested in writing) and has utilized such access to Holder's
satisfaction for the purpose of obtaining information about the Company.

               (c) The Holder represents and warrants that this Warrant is being
acquired for Holder's own account and without the intention of reselling or
redistributing the same. Holder further understands and agrees that the
transferability of the Warrant is restricted as described herein.

               (d) The Holder hereby represents that it is an "accredited
investor" within the meaning of Rule 501 of Regulation D under the Securities
Act.

                                       7
<PAGE>
ATTEST:                                      VISIONICS CORPORATION

/s/ Randy J. Meyer                           /s/ Robert F. Gallagher
-----------------------------------          -----------------------------------
Randy J. Meyer                               Robert F. Gallagher
Assistant Secretary                          Chief Financial Officer

                                             THOMAS PIERCE

                                             /s/ Thomas Pierce
                                             -----------------------------------
                                             Thomas Pierce

                                       8
<PAGE>
                           NOTICE OF WARRANT EXERCISE

                  (To be signed only upon exercise of Warrant)

TO:     VISIONICS CORPORATION

        The undersigned hereby irrevocably elects to exercise the attached
Warrant to purchase for cash, _________ of the shares issuable upon the exercise
of such Warrant, and requests that certificates for such shares (together with a
new Warrant to purchase the number of shares, if any, with respect to which this
Warrant is not exercised) shall be issued in the name of, and be delivered to.

                                                  ------------------------------
                                                  (Print Name)

                                                  ------------------------------

                                                  ------------------------------

                                                  ------------------------------
                                                  (Address)

        Please insert social security or other identifying number of registered
holder of certificate.

                                                  ------------------------------

Signature*
          ------------------------------

Date:______________, 200_

        *The signature of the Notice of Exercise of Warrant must correspond to
the name as written upon the face of the Warrant in every particular without
alteration or enlargement or any change whatsoever. When signing on behalf of a
corporation, partnership, trust or other entity. PLEASE indicate your
position(s) and title(s) with such entity.

                                       9
<PAGE>
                               WARRANT ASSIGNMENT

                  (To be signed only upon transfer of Warrant)

        FOR VALUE RECEIVED, the undersigned hereby sells, assigns and transits
        unto the right represented by the foregoing warrant to purchase Common
        Stock of VISIONICS CORPORATION, to which the foregoing warrant relates
        and appoints attorney to transfer said right on the books of VISIONICS
        CORPORATION, with full power of substitution in the premises.

        The manner of the proposed transfer by the undersigned is described
briefly in the space below.

Dated:___________________

                                                  ------------------------------
                                                  (Signature)

                                                  ------------------------------

                                                  ------------------------------

                                                  ------------------------------
                                                  (Address)
In Presence of:

------------------------------
(Print Name)

------------------------------

                                       10

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