Document:

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                                                                    Exhibit (4)B

                                   ECOLAB INC.

                        OFFICER'S CERTIFICATE PURSUANT TO
                 SECTIONS 2.1 AND 2.3 AND SECTION 2.6(b) OF THE
                         AMENDED AND RESTATED INDENTURE

                                JANUARY 23, 2001

     1.   I, Daniel J. Schmechel, do hereby certify that I am the duly appointed
Treasurer of Ecolab Inc., a Delaware corporation (the "COMPANY").

          I further certify, pursuant to the authority delegated to me, as
Treasurer of the Company, by the Chief Financial Officer of the Company
pursuant to resolutions adopted on August 18, 2000 by the Board of Directors
of the Company (the "BOARD") (copies of which resolutions and letter of
delegation are attached hereto as EXHIBIT I), that, pursuant to Section 2.3
of the Amended and Restated Indenture, dated as of January 9, 2001 (the
"INDENTURE"), between the Company and Bank One, National Association (f/k/a
The First National Bank of Chicago), a national banking association, as
trustee (the "TRUSTEE"), which indenture amends and restates the Indenture,
dated as of November 1, 1996, between the Company and the Trustee, a series
of debt securities of the Company is hereby established with the following
terms and provisions (unless otherwise defined herein, capitalized terms used
herein have the meanings given thereto in the Indenture):

               (a)  The title of such series of debt securities is the "6.875%
Notes due February 1, 2011" (the "NOTES").

               (b)  The aggregate principal amount of the Notes that may be
authenticated and delivered under the Indenture is $150,000,000 (except for
Notes authenticated and delivered upon registration of transfer of, or in
exchange for, or in lieu of, or upon redemption of, other Notes pursuant to
Sections 2.8, 2.9, 2.11 or 12.3 of the Indenture).

               (c)  The Stated Maturity of the Notes is February 1, 2011.

               (d)  The Notes shall bear interest at 6.875% per annum from
January 26, 2001, or from the most recent Interest Payment Date to which
interest has been paid or duly provided for, payable semiannually on February 1
and August 1 of each year (each, an "INTEREST PAYMENT DATE"), commencing August
1, 2001, to the Persons in whose names the Notes (or one or more predecessor
Securities) are registered at the close of business on the Regular Record Date
for

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such interest, which shall be the January 15 or July 15 (as the case may be),
whether or not a Business Day, immediately preceding such Interest Payment Date.

               (e)  Interest on the Notes shall be calculated on the basis of a
360-day year of twelve 30-day months and, for any period shorter than a full
six-month interest period, on the basis of the actual number of days elapsed in
such period.

               (f)  The principal of and any interest on the Notes shall be
payable at such place or places as provided in Section 3.2 of the Indenture.

               (g)  The Notes may be redeemed, in whole or in part, by, and at
the option of, the Company at any time after issuance and prior to maturity at a
price equal to the greater of:

               -    100% of the principal amount of the Notes to be redeemed; or

               -    the sum of the present values of the Remaining Scheduled
                    Payments discounted to the Redemption Date on a semiannual
                    basis (assuming a 360-day year consisting of twelve 30-day
                    months) at the Treasury Rate plus 35 basis points,

plus, in either case, accrued and unpaid interest on the principal amount being
redeemed to the Redemption Date; PROVIDED, HOWEVER, that with respect to
interest payments that are due on or prior to the Redemption Date, the Company
will make payments of interest to the Holders of record of the Notes at the
close of business on the Regular Record Date.

               "COMPARABLE TREASURY ISSUE" means the United States Treasury
security selected by an Independent Investment Banker as having a maturity
comparable to the remaining term of the Notes to be redeemed that would be used,
at the time of selection and in accordance with customary financial practice, in
pricing new issues of corporate debt securities of comparable maturity to the
remaining term of such Notes.

               "COMPARABLE TREASURY PRICE" means, with respect to any Redemption
Date, (1) the arithmetic average of the bid and asked prices for the Comparable
Treasury Issue (expressed in each case as a percentage of its principal

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amount) on the third Business Day before such Redemption Date, as published in
the daily statistical release (or any successor release) by the Federal Reserve
Bank of New York and designated "Composite 3:30 p.m. Quotations for U.S.
Government Securities" or (2) if such release (or any successor release) is not
available or does not contain such prices on such Business Day, the arithmetic
average of the Reference Treasury Dealer Quotations for such Redemption Date.

               "INDEPENDENT INVESTMENT BANKER" means one of the Reference
Treasury Dealers appointed by the Company.

               "REFERENCE TREASURY DEALER" means Credit Suisse First Boston
Corporation, Banc of America Securities LLC and their successors; PROVIDED,
HOWEVER, that if Credit Suisse First Boston Corporation or Banc of America
Securities LLC ceases to be a primary U.S. government securities dealer in New
York City (a "PRIMARY TREASURY DEALER"), the Company will substitute another
Primary Treasury Dealer.

               "REFERENCE TREASURY DEALER QUOTATIONS" means, with respect to
each Reference Treasury Dealer and any Redemption Date, the arithmetic average,
as determined by the Trustee, of the bid and asked prices for the Comparable
Treasury Issue (expressed in each case as a percentage of its principal amount)
quoted in writing to the Trustee by the Reference Treasury Dealer by 5:00 p.m.
on the third Business Day before such Redemption Date.

               "REMAINING SCHEDULED PAYMENTS" means, with respect to each Note
to be redeemed, the remaining scheduled payments of the principal and interest
on such Note that would be due after the related Redemption Date but for such
redemption; PROVIDED, HOWEVER, that if such Redemption Date is not an Interest
Payment Date, the amount of the next succeeding scheduled interest payment on
such Note will be reduced by the amount of interest accrued on such Note to such
Redemption Date.

               "TREASURY RATE" means, with respect to any Redemption Date, the
rate per annum equal to the semiannual equivalent yield to maturity of the
Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue
(expressed as a percentage of its principal amount) equal to the Comparable
Treasury Price for such Redemption Date.

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               Unless the Company defaults in payment of the Redemption Price,
on and after the Redemption Date, interest will cease to accrue on the Notes or
portions thereof called for redemption.

               Except as otherwise set forth in this paragraph (g), the terms
and conditions upon which and the manner in which the Notes may be redeemed by
the Company pursuant to this paragraph (g) are governed by the provisions of
Article XII of the Indenture; PROVIDED that Section 12.5 of Article XII of the
Indenture shall not apply to the Notes.

               (h)  The Company has no obligation to redeem, purchase or repay
the Notes pursuant to any mandatory redemption or sinking fund or analogous
provisions or at the option of any Holder thereof.

               (i)  The Notes are issuable in denominations of $1,000 and any
integral multiple thereof.

               (j)  The entire $150,000,000 principal amount of the Notes shall
be payable upon declaration of acceleration of the maturity thereof pursuant to
Section 5.2 under the Indenture.

               (k)  The Notes will not be Original Issue Discount Securities.

               (l)  The Notes shall be issued as one or more Registered Global
Securities without Coupons.

               (m)  The Notes will be issued in permanent global form. The
Company initially appoints The Depository Trust Company, New York, New York
("DTC"), to act as the Depositary with respect to the Notes.

               (n)  [Reserved.]

               (o)  [Reserved.]

               (p)  Payment of the principal and interest on the Notes will be
made in Dollars.

               (q)  [Reserved.]

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               (r)  The defeasance and covenant defeasance provisions of Article
X of the Indenture will apply to the Notes.

               (s)  The Events of Default set forth in Article V of the
Indenture and the covenants (other than those set forth in Sections 3.6 and 3.10
of the Indenture) set forth in Article III of the Indenture will apply to the
Notes.

               (t)  [Reserved.]

               (u)  The Trustee, the initial Paying Agent and the initial
Security Registrar shall be Bank One, National Association. The initial
Depositary with respect to the Notes shall be DTC. The Security Register for the
Notes shall be initially maintained at the Trustee's Corporate Trust Office in
the Borough of Manhattan, the City of New York.

               (v)  The Depositary for the Notes is DTC.

               (w)  Presentations and demands with respect to the Notes may be
made and notices with respect to the Notes may be served at the Corporate Trust
Office of the Trustee.

               (x)  The Company will not pay additional amounts on the Notes
held by Non-U.S. Persons in respect of any tax, assessment or governmental
charge withheld or deducted.

               (y)  [Reserved.]

     2.   The Notes will be evidenced by a Global Security in substantially the
form attached hereto as EXHIBIT II, with such appropriate insertions, omissions,
substitutions and other variations as are required or permitted by the Indenture
and may have imprinted or otherwise reproduced thereon such legend or legends or
endorsements, not inconsistent with the provisions of the Indenture, as may be
required to comply with any law or with any rules or regulations pursuant
thereto, or with any rules of any securities exchange or to conform to general
usage, all as may be determined by the officers executing such Global Security,
as evidenced by their execution of such Global Security. In the event that
certificated Notes (the "CERTIFICATED NOTES") are issued in exchange for the
Global Security, the form of certificate evidencing each Certificated Note shall
be in substantially the form of the attached Global Security, with such changes
as are necessary to evidence the Notes in definitive form rather than as a
Global Security.

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     3.   The form and terms of the Notes as established in this certificate
have been established pursuant to Sections 2.1 and 2.3 of the Indenture and
comply with the Indenture.

                            [Signature page follows.]

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     IN WITNESS WHEREOF, I have executed this certificate this 23rd day of
January 2001.

                                        /s/ Daniel J. Schmechel
                                        -------------------------------
                                        Daniel J. Schmechel
                                        Treasurer<PAGE>

CUSIP NO. 278865AG5                                                EXHIBIT (4)C

                        6.875% Notes Due February 1, 2011

No. _____________                                             $_________________

                                   ECOLAB INC.

UNLESS AND UNTIL THIS CERTIFICATE IS EXCHANGED IN WHOLE OR IN PART FOR NOTES IN
DEFINITIVE REGISTERED FORM, THIS CERTIFICATE MAY NOT BE TRANSFERRED EXCEPT AS A
WHOLE BY THE DEPOSITARY TO A NOMINEE THEREOF OR BY A NOMINEE THEREOF TO THE
DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH
NOMINEE TO A SUCCESSOR OF THE DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR
DEPOSITARY.

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITORY TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK) TO THE ISSUER OR
ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND SUCH
CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO., OR SUCH OTHER NAME
AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITARY, ANY TRANSFER,
PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS
WRONGFUL, SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

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          Ecolab Inc., a Delaware corporation (herein referred to as the
"Company", which term includes any successor corporation under the Indenture
hereinafter referred to), for value received, hereby promises to pay to Cede &
Co., or registered assigns, the principal sum of $150,000,000 on February 1,
2011 (the "Maturity Date") and to pay interest thereon from January 26, 2001, or
from the most recent Interest Payment Date to which interest has been paid or
duly provided for, semiannually on February 1 and August 1 in each year (each,
an "Interest Payment Date"), commencing August 1, 2001, at 6.875% per annum
until the principal hereof is paid or duly provided for.

          Any payment of principal or interest required to be made on a day that
is not a Business Day need not be made on such day, but may be made on the next
succeeding Business Day with the same force and effect as if made on such day
and no interest shall accrue as a result of such delayed payment. Interest
payable on each Interest Payment Date will include interest accrued from and
including January 26, 2001, or from and including the most recent Interest
Payment Date to which interest has been paid or duly provided for, as the case
may be, to but excluding such Interest Payment Date.

          The interest so payable, and punctually paid or duly provided for, on
any Interest Payment Date will, as provided in the Indenture, be paid to the
person (the "Holder") in whose name this Note (or one or more predecessor
Securities) is registered at the close of business on the January 15 and July 15
(whether or not a Business Day) next preceding such Interest Payment Date (a
"Regular Record Date"). Any such interest not so punctually paid or duly
provided for ("Defaulted Interest") will forthwith cease to be payable to the
Holder on such Regular Record Date and may either be paid to the Person in whose
name this Note (or one or more predecessor Securities) is registered at the
close of business on a special record date (the "Special Record Date") for the
payment of such Defaulted Interest to be fixed by the Trustee (referred to
herein), notice whereof shall be given to the Holder of this Note not less than
ten days prior to such Special Record Date, or may be paid at any time in any
other lawful manner, all as more fully provided in the Indenture.

          For purposes of this Note, "Business Day" means any day that, in the
city of the principal Corporate Trust Office of the Trustee and in the city of
New York, New York, is neither a Saturday, Sunday, or legal holiday nor a day on
which banking institutions are authorized or required by law or regulation to
close.

          Payment of the principal of this Note on the Maturity Date will be
made against presentation of this Note at the office or agency of the Company
maintained for that purpose in the Borough of Manhattan, the City of New York,
in such coin or currency of the United States of America as at the time of
payment is legal tender for the payment of public and private debts. So long as
this Note remains in book-entry form, all payments of principal and interest
will be made by the Company in immediately available funds.

          GENERAL. This Note is one of a duly authorized issue of securities
(herein called the "Securities") of the Company, issued and to be issued in one
or more series under an Amended and Restated Indenture, dated as of January 9,
2001 (as it may be supplemented from time to time, herein called the
"Indenture"),

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between the Company and Bank One, National Association (f/k/a The First
National Bank of Chicago), amends and restates the Indenture, dated as of
November 1, 1996, between the Company and the Trustee, a national banking
association, as trustee (herein called the "Trustee," which term includes any
successor trustee under the Indenture with respect to a series of which this
Note is a part), which indenture amends and restates the Indenture, dated as
of November 1, 1996, between the Company and the Trustee. Reference is made
to the Indenture and all indentures supplemental thereto, reference is hereby
made for a statement of the respective rights, limitations of rights, duties
and immunities thereunder of the Company, the Trustee and the Holders of the
Securities, and of the terms upon which the Securities are, and are to be,
authenticated and delivered. This Note is one of a duly authorized series of
Securities designated as "6.875% Notes due February 1, 2011" (collectively,
the "Notes").

          EVENTS OF DEFAULT. If an Event of Default with respect to the Notes
shall have occurred and be continuing, the principal of the Notes may be
declared due and payable in the manner and with the effect provided in the
Indenture.

          MATURITY. The Notes may be redeemed, in whole or in part, by, and at
the option of, the Company at any time after issuance and prior to the Maturity
Date at a price equal to the greater of:

     -    100% of the principal amount of the Notes to be redeemed; or

     -    the sum of the present values of the Remaining Scheduled Payments
discounted to the Redemption Date on a semiannual basis (assuming a 360-day year
consisting of twelve 30-day months) at the Treasury Rate plus 35 basis points,

plus, in either case, accrued and unpaid interest on the principal amount being
redeemed to the Redemption Date; provided, however, that with respect to
interest payments that are due on or prior to the Redemption Date, the Company
will make payments of interest to the Holders of record of the Notes at the
close of business on the Regular Record Date.

     "Comparable Treasury Issue" means the United States Treasury security
selected by an Independent Investment Banker as having a maturity comparable to
the remaining term of the Notes to be redeemed that would be used, at the time
of selection and in accordance with customary financial practice, in pricing new
issues of corporate debt securities of comparable maturity to the remaining term
of such Notes.

     "Comparable Treasury Price" means, with respect to any Redemption Date, (1)
the arithmetic average of the bid and asked prices for the Comparable Treasury
Issue (expressed in each case as a percentage of its principal amount) on the
third Business Day before such Redemption Date, as published in the daily
statistical release (or any successor release) by the Federal Reserve Bank of
New York and designated "Composite 3:30 p.m. Quotations for U.S. Government
Securities" or (2) if such release (or any successor release) is not available
or does not contain such prices on such Business Day, the arithmetic average of
the Reference Treasury Dealer Quotations (as defined below) for such redemption
date.

     "Independent Investment Banker" means one of the Reference Treasury Dealers
appointed by the Company.

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     "Reference Treasury Dealer" means Credit Suisse First Boston Corporation,
Banc of America Securities LLC and their successors; provided, however, that if
Credit Suisse First Boston Corporation or Banc of America Securities LLC ceases
to be a primary U.S. government securities dealer in New York City (a "Primary
Treasury Dealer"), the Company will substitute another Primary Treasury Dealer.

     "Reference Treasury Dealer Quotations" means, with respect to each
Reference Treasury Dealer and any Redemption Date, the arithmetic average, as
determined by the Trustee, of the bid and asked prices for the Comparable
Treasury Issue (expressed in each case as a percentage of its principal amount)
quoted in writing to the Trustee by the Reference Treasury Dealer by 5:00 p.m.
on the third Business Day before such Redemption Date.

     "Remaining Scheduled Payments" means, with respect to each Note to be
redeemed, the remaining scheduled payments of the principal and interest on such
Note that would be due after the related Redemption Date but for such
redemption; provided, however, that if such Redemption Date is not an Interest
Payment Date, the amount of the next succeeding scheduled interest payment on
such Note will be reduced by the amount of interest accrued on such Note to such
Redemption Date.

     "Treasury Rate" means, with respect to any Redemption Date, the rate per
annum equal to the semiannual equivalent yield to maturity of the Comparable
Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as
a percentage of its principal amount) equal to the Comparable Treasury Price for
such Redemption Date.

     Unless the Company defaults in payment of the Redemption Price, on and
after the Redemption Date, interest will cease to accrue on the Notes or
portions thereof called for redemption.

          Except as otherwise set forth above, the terms and conditions upon
which and the manner in which the Notes may be redeemed by the Company under the
foregoing provisions are governed by Article XII of the Indenture; provided that
Section 12.5 of the Indenture shall not apply to the Notes.

          MODIFICATION AND WAIVERS; OBLIGATIONS OF THE COMPANY ABSOLUTE. The
Indenture permits, with certain exceptions as therein provided, the amendment
thereof and the modification of the rights and obligations of the Company and
the rights of the Holders of the Securities of each series. Such amendment may
be effected under the Indenture at any time, subject, with certain exceptions,
to the consent of the Holders of not less than a majority in principal amount of
all Securities issued under the Indenture at the time Outstanding and affected
thereby. The Indenture also contains provisions permitting the Holders of not
less than a majority in principal amount of the Securities at the time
Outstanding, on behalf of the Holders of all Outstanding Securities, to waive
compliance by the Company with certain provisions of the Indenture. Furthermore,
provisions in the Indenture permit the Holders of not less than a majority in
principal amount of the Outstanding Securities of individual series to waive on
behalf of all of the Holders of Securities of such individual series certain
past defaults under the Indenture and their consequences. Any such consent or
waiver shall be conclusive and binding upon the Holder of this Note and upon all
future Holders of this Note and of any Note issued upon the

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registration of transfer hereof or in exchange hereof or in lieu hereof, whether
or not notation of such consent or waiver is made upon this Note.

          No reference herein to the Indenture and no provision of this Note or
of the Indenture shall alter or impair the obligation of the Company, which is
absolute and unconditional, to pay the principal of and interest on this Note at
the times, place and rate, and in the coin or currency herein prescribed.

          DEFEASANCE AND COVENANT DEFEASANCE. The Indenture contains provisions
for defeasance at any time of (a) the entire indebtedness of the Company on this
Note and (b) certain restrictive covenants and the related defaults and Events
of Default, upon compliance by the Company with certain conditions set forth
therein, which provisions apply to this Note.

          AUTHORIZED DENOMINATIONS. The Notes are issuable only in registered
form without coupons in denominations of $1,000 or any amount in excess thereof
which is an integral multiple of $1,000.

          REGISTRATION OF TRANSFER OR EXCHANGE. As provided in the Indenture and
subject to certain limitations herein and therein set forth, the transfer of
this Note is registrable in the Security Register upon presentation of this Note
for registration of transfer at the office or agency of the Company in any place
where the principal of and interest on this Note are payable, duly endorsed by,
or accompanied by a written instrument of transfer in form satisfactory to the
Company and the Security Registrar duly executed by, the Holder hereof or his
attorney duly authorized in writing, and thereupon one or more new Notes, of
authorized denominations and for the same aggregate principal amount, will be
issued to the designated transferee or transferees.

          As provided in the Indenture and subject to certain limitations herein
and therein set forth, the Notes are exchangeable for a like aggregate principal
amount of Notes of different authorized denominations, as requested by the
Holders surrendering the same.

          This Note is a Global Security. If the Depositary is at any time
unwilling, unable or ineligible to continue as Depositary and a successor
Depository is not appointed by the Company within 90 days, the Company will
issue Notes in definitive registered form without Coupons, in any authorized
denominations, of like tenor, in an aggregate principal amount equal to the
principal amount of the Registered Global Security or Securities representing
the Notes (each a "Registered Global Note"), in exchange for such Registered
Global Note or Notes. In addition, the Company may at any time and in its sole
discretion determine that the Notes will no longer be represented by Registered
Global Notes and, in such event, will issue Notes in definitive registered form,
in such tenor, in any authorized denominations and in an aggregate principal
amount equal to the principal amount of the Registered Global Notes representing
such Notes, in exchange for such Registered Global Notes. In any such instance,
an owner of a beneficial interest in a Global Note will be entitled to physical
delivery in definitive registered form of Notes equal in principal amount to
such beneficial interest and to have such Notes registered in its name. Notes so
issued in definitive registered form will be issued in

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denominations of $1,000 or any amount in excess thereof which is an integral
multiple of $1,000 and will be issued in registered form only, without coupons.

          No service charge shall be made for any such registration of transfer
or exchange, but the Company may require payment of a sum sufficient to cover
any tax or other governmental charge payable in connection therewith.

          Prior to due presentment of this Note for registration of transfer,
the Company, the Trustee and any agent of the Company or the Trustee may treat
the Holder as the owner hereof for all purposes, whether or not this Note be
overdue, and neither the Company, the Trustee nor any agent of the Company or
the Trustee shall be affected by notice to the contrary.

          DEFINED TERMS. All terms used in this Note which are defined in the
Indenture and are not otherwise defined herein shall have the meanings assigned
to them in the Indenture.

          GOVERNING LAW. This Note shall be deemed to be a contract under the
laws of the State of New York, and for all purposes will be construed in
accordance with the laws of such State, except as may otherwise be required by
mandatory provisions of law.

          Unless the certificate of authentication hereon has been executed by
the Trustee by manual signature, this Note shall not be entitled to any benefit
under the Indenture or be valid or obligatory for any purpose.

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          IN WITNESS WHEREOF, the Company has caused this instrument to be duly
executed under its facsimile corporate seal.

Dated: January 26, 2001

     TRUSTEE'S CERTIFICATE
       OF AUTHENTICATION

This is one of the Securities
referred to in the within-
mentioned Indenture

BANK ONE, NATIONAL ASSOCIATION,         ECOLAB INC.
 as Trustee

                                        By:
                                           -------------------------------------

By:                                     Attest:
   --------------------------                  ---------------------------------
      Authorized Signatory                                 Secretary

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                                 ASSIGNMENT FORM

          To assign this Note, fill in the form below: (I) or (we) assign and
transfer this Note to

--------------------------------------------------------------------------------
                  (Insert assignee's soc. sec. or tax I.D. no.)

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

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

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

--------------------------------------------------------------------------------
              (Print or type assignee's name, address and zip code)

and irrevocably appoint _______________________________________________ to
transfer this Note on the books of Ecolab Inc. The agent may substitute another
to act for him.

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

Date:
     ------------------------

                                        Your Signature:

                                        -------------------------
                                        (Sign exactly as your name appears on
                                        the face of this Note)

                                        Signature guarantee:

                                       8

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