Document:

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                                                                     Exhibit 4.1

                                     Form of

                          SUPPLEMENTAL INDENTURE NO. 14

                                 by and between

                              HRPT PROPERTIES TRUST

                                       and

                         U.S. BANK NATIONAL ASSOCIATION

                              as of August 5, 2004

             SUPPLEMENTAL TO THE INDENTURE DATED AS OF JULY 9, 1997

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

                              HRPT PROPERTIES TRUST

                      6 1/4% Senior Notes due August 15, 2016

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

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     This SUPPLEMENTAL INDENTURE NO. 14 (this "Supplemental Indenture") made and
entered into as of August 5, 2004 between HRPT PROPERTIES TRUST, a Maryland real
estate investment trust (the "Company"), and U.S. BANK NATIONAL ASSOCIATION, a
national banking association (as successor to State Street Bank and Trust
Company in its capacity as Trustee), as Trustee (the "Trustee"),

                                WITNESSETH THAT:

     WHEREAS, the Company and the Trustee are parties to an Indenture, dated as
of July 9, 1997 (the "Indenture"), relating to the Company's issuance, from time
to time, of various series of debt securities;

     WHEREAS, the Company has determined to issue debt securities known as its
6 1/4% Senior Notes due August 15, 2016; and

     WHEREAS, the Indenture provides that certain terms and conditions for each
series of debt securities issued by the Company thereunder may be set forth in
an indenture supplemental to the Indenture;

     NOW, THEREFORE, THIS SUPPLEMENTAL INDENTURE WITNESSETH:

                                    ARTICLE 1

                                  DEFINED TERMS

     SECTION 1.1    The following definitions supplement, and, to the extent
inconsistent with, replace the definitions in Section 101 of the Indenture:

     "Acquired Debt" means Debt of a Person or entity (i) existing at the time
such Person or entity becomes a Subsidiary or (ii) assumed in connection with
the acquisition of assets from such Person or entity, in each case, other than
Debt incurred in connection with, or in contemplation of, such Person or entity
becoming a Subsidiary or such acquisition. Acquired Debt shall be deemed to be
incurred on the date of the related acquisition of assets from any Person or
entity or the date the acquired Person or entity becomes a Subsidiary.

     "Annual Debt Service" as of any date means the maximum amount which is
expensed in any 12-month period for interest on Debt of the Company and its
Subsidiaries.

     "Business Day" means any day other than a Saturday or Sunday or a day on
which banking institutions in the City of New York or in the city in which the
Corporate Trust Office of the Trustee is located, are required or authorized to
close.

     "Capital Stock" means, with respect to any Person, any capital stock
(including preferred stock), shares, interests, participation or other ownership
interests (however designated) of such Person and any rights (other than debt
securities convertible into or exchangeable for capital stock), warrants or
options to purchase any thereof.

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     "Consolidated Income Available for Debt Service" for any period means
Earnings from Operations of the Company and its Subsidiaries plus amounts which
have been deducted, and minus amounts which have been added, for the following
(without duplication): (i) interest on Debt of the Company and its Subsidiaries,
(ii) provision for taxes of the Company and its Subsidiaries based on income,
(iii) amortization of debt discount and deferred financing costs, (iv)
provisions for gains and losses on properties and property, depreciation and
amortization, (v) the effect of any noncash charge resulting from a change in
accounting principles in determining Earnings from Operations for such period
and (vi) amortization of deferred charges.

     "Corporate Trust Office" means the corporate trust office of the Trustee
which it designates as the office at which the agreement in question will be
administered (which it may change by notice from time to time), presently
located at One Federal Street, 3rd Floor, Boston, Massachusetts 02110.

     "Debt" of the Company or any Subsidiary means, without duplication, any
indebtedness of the Company or any Subsidiary, whether or not contingent, in
respect of (i) borrowed money or evidenced by bonds, notes, debentures or
similar instruments, (ii) indebtedness for borrowed money secured by any
Encumbrance existing on property owned by the Company or any Subsidiary, to the
extent of the lesser of (x) the amount of indebtedness so secured and (y) the
fair market value of the property subject to such Encumbrance, (iii) the
reimbursement obligations, contingent or otherwise, in connection with any
letters of credit actually issued (other than letters of credit issued to
provide credit enhancement or support with respect to other indebtedness of the
Company or any Subsidiary otherwise reflected as Debt hereunder) or amounts
representing the balance deferred and unpaid of the purchase price of any
property or services, except any such balance that constitutes an accrued
expense or trade payable, or all conditional sale obligations or obligations
under any title retention agreement, (iv) the principal amount of all
obligations of the Company or any Subsidiary with respect to redemption,
repayment or other repurchase of any Disqualified Stock, or (v) any lease of
property by the Company or any Subsidiary as lessee which is reflected on the
Company's consolidated balance sheet as a capitalized lease in accordance with
GAAP, to the extent, in the case of items of indebtedness under (i) through
(iii) above, that any such items (other than letters of credit) would appear as
a liability on the Company's consolidated balance sheet in accordance with GAAP,
and also includes, to the extent not otherwise included, any obligation by the
Company or any Subsidiary to be liable for, or to pay, as obligor, guarantor or
otherwise (other than for purposes of collection in the ordinary course of
business), Debt of another Person (other than the Company or any Subsidiary) (it
being understood that Debt shall be deemed to be incurred by the Company or any
Subsidiary whenever the Company or such Subsidiary shall create, assume,
guarantee or otherwise become liable in respect thereof).

     "Disqualified Stock" means, with respect to any Person, any Capital Stock
of such Person which by the terms of such Capital Stock (or by the terms of any
security into which it is convertible or for which it is exchangeable or
exercisable), upon the happening of any event or otherwise (i) matures or is
mandatorily redeemable, pursuant to a sinking fund obligation or otherwise
(other than Capital Stock which is redeemable solely in exchange for common
stock or shares), (ii) is convertible into or exchangeable or exercisable for
Debt or Disqualified Stock, or (iii) is redeemable at the option of the holder
thereof, in whole or in part (other than Capital Stock which is redeemable
solely in exchange for common stock or shares), in each case on or prior to the
stated maturity of the Notes.

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     "Earnings from Operations" for any period means net earnings excluding
gains and losses on sales of investments, extraordinary items, gains and losses
on early extinguishment of debt and property valuation losses, as reflected in
the financial statements of the Company and its Subsidiaries for such period,
determined on a consolidated basis in accordance with GAAP.

     "Encumbrance" means any mortgage, lien, charge, pledge or security interest
of any kind.

     "Make-Whole Amount" means, in connection with any optional redemption or
accelerated payment of any notes prior to February 15, 2016, the excess, if any,
of (i) the aggregate present value as of the date of such redemption or
accelerated payment of each dollar of principal being redeemed or paid and the
amount of interest (exclusive of interest accrued to the date of redemption or
accelerated payment) that would have been payable in respect of such dollar if
such redemption or accelerated payment had been made on February 15, 2016,
determined by discounting, on a semiannual basis, such principal and interest at
the Reinvestment Rate (determined on the third Business Day preceding the date
such notice of redemption is given or declaration of acceleration is made) from
the respective dates on which such principal and interest would have been
payable if such redemption or accelerated payment had been made on February 15,
2016, over (ii) the aggregate principal amount of the Notes being redeemed or
paid. In the case of any redemption or accelerated payment of notes on or after
February 15, 2016, the Make-Whole Amount means zero. For purposes of this
Supplemental Indenture and the Notes, references in the Indenture to the payment
of the principal (and premium, if any) and interest on the Notes shall be deemed
to include the payment of the Make-Whole Amount, if any, due upon redemption
with respect to the Notes. The Make-Whole Amount shall be calculated by the
Company and set forth in an Officer's Certificate delivered to the Trustee, and
the Trustee shall be entitled to rely on said Officer's Certificate.

     "Notes" means the Company's 6 1/4% Senior Notes due August 15, 2016,
issued under this Supplemental Indenture and the Indenture, as amended or
supplemented from time to time.

     "Reinvestment Rate" means a rate per annum equal to the sum of 0.30%
(thirty one-hundredths of one percent) plus the yield on treasury securities at
constant maturity under the heading "Week Ending" published in the Statistical
Release under the caption "Treasury Constant Maturities" for the maturity
(rounded to the nearest month) corresponding to the remaining life to maturity
(which, in the case of maturities corresponding to the principal and interest
due on the notes at their maturity, shall be deemed to be February 15, 2016), as
of the payment date of the principal being redeemed or paid. If no maturity
exactly corresponds to such maturity, yields for the two published maturities
most closely corresponding to such maturity shall be calculated pursuant to the
immediately preceding sentence and the Reinvestment Rate shall be interpolated
or extrapolated from such yields on a straight-line basis, rounding in each of
such relevant periods to the nearest month For purposes of calculating the
Reinvestment Rate, the most recent Statistical Release published prior to the
date of determination of the Make-Whole Amount shall be used.

     "Secured Debt" means Debt secured by any mortgage, lien, charge, pledge or
security interest of any kind.

     "Statistical Release" means the statistical release designated "H.15(519)"
or any successor publication which is published weekly by the Federal Reserve
System and which establishes yields

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on actively traded United States government securities adjusted to constant
maturities or, if such statistical release is not published at the time of any
determination under this Supplemental Indenture, then any publicly available
source of similar market data which shall be designated by the Company.

     "Subsidiary" means any corporation or other entity of which a majority of
(i) the voting power of the voting equity securities or (ii) the outstanding
equity interests of which are owned, directly or indirectly, by the Company or
one or more other Subsidiaries of the Company. For the purposes of this
definition, "voting equity securities" means equity securities having voting
power for the election of directors, whether at all times or only so long as no
senior class of security has such voting power by reason of any contingency.

     "Total Assets" as of any date means the sum of (i) the Undepreciated Real
Estate Assets and (ii) all other assets of the Company and its Subsidiaries
determined in accordance with GAAP (but excluding accounts receivable and
intangibles).

     "Total Unencumbered Assets" means the sum of (i) those Undepreciated Real
Estate Assets not subject to an Encumbrance for borrowed money and (ii) all
other assets of the Company and its Subsidiaries not subject to an Encumbrance
for borrowed money determined in accordance with GAAP (but excluding accounts
receivable and intangibles).

     "Undepreciated Real Estate Assets" as of any date means the cost (original
cost plus capital improvements) of real estate assets of the Company and its
Subsidiaries on such date, before depreciation and amortization, determined on a
consolidated basis in accordance with GAAP.

     "Unsecured Debt" means Debt which is not secured by any of the properties
of the Company or any Subsidiary.

                                    ARTICLE 2

                               TERMS OF THE NOTES

     SECTION 2.1    Pursuant to Section 301 of the Indenture, the Notes shall
have the following terms and conditions:

     (a)  TITLE; AGGREGATE PRINCIPAL AMOUNT; FORM OF NOTES. The Notes shall
be Registered Securities under the Indenture and shall be known as the
Company's "6 1/4% Senior Notes due August 15, 2016." The Notes will be
limited to an aggregate principal amount of $400,000,000, subject to the
right of the Company to reopen such series for issuances of additional
securities of such series and except as provided in this Section or in
Section 306 of the Indenture. The Notes (together with the Trustee's
certificate of authentication) shall be substantially in the form of Exhibit
A hereto, which is hereby incorporated in and made a part of this
Supplemental Indenture.

     The Notes will be issued in the form of one or more registered global
securities without coupons ("Global Notes") that will be deposited with, or on
behalf of, The Depository Trust Company ("DTC"), and registered in the name of
DTC's nominee, Cede & Co. Except under the circumstance described below, the
Notes will not be issuable in definitive form. Unless and until it is exchanged
in whole or in part for the individual notes represented thereby, a Global Note
may

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not be transferred except as a whole by DTC to a nominee of DTC or by a nominee
of DTC to DTC or another nominee of DTC or by DTC or any nominee of DTC to a
successor depositary or any nominee of such successor.

     So long as DTC or its nominee is the registered owner of a Global Note, DTC
or such nominee, as the case may be, will be considered the sole owner or holder
of the Notes represented by such Global Note for all purposes under this
Supplemental Indenture. Except as described below, owners of beneficial interest
in Notes evidenced by a Global Note will not be entitled to have any of the
individual Notes represented by such Global Note registered in their names, will
not receive or be entitled to receive physical delivery of any such Notes in
definitive form and will not be considered the owners or holders thereof under
the Indenture or this Supplemental Indenture.

     If DTC is at any time unwilling, unable or ineligible to continue as
depositary and a successor depositary is not appointed by the Company within 90
days, the Company will issue individual Notes in exchange for the Global Note or
Global Notes representing such Notes. In addition, the Company may at any time
and in its sole discretion, subject to certain limitations set forth in the
Indenture, determine not to have any of such Notes represented by one or more
Global Notes and, in such event, will issue individual Notes in exchange for the
Global Note or Global Notes representing the Notes. Individual Notes so issued
will be issued in denominations of $1,000 and integral multiples thereof.

     (b)  INTEREST AND INTEREST RATE. The Notes will bear interest at a rate of
6 1/4% per annum, from August 5, 2004 (or, in the case of Notes issued upon the
reopening of this series of Notes, from the date designated by the Company in
connection with such reopening) or from the immediately preceding Interest
Payment Date to which interest has been paid or duly provided for, payable
semiannually on each February 15 and August 15, commencing February 15, 2005
(each of which shall be an "Interest Payment Date"), to the Persons in whose
names the Notes are registered in the Security Register at the close of business
on the day falling 14 calendar days (whether or not a Business Day) next
preceding such Interest Payment Date (each, a "Regular Record Date").

     (c)  PRINCIPAL REPAYMENT; CURRENCY. The stated maturity of the Notes is
August 15, 2016, provided, however, the Notes may be earlier redeemed at the
option of the Company as provided in paragraph (d) below. The principal of each
Note payable on its maturity date shall be paid against presentation and
surrender thereof at the Corporate Trust Office of the Trustee 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 or private debts. The Company will not pay
Additional Amounts (as defined in the Indenture) on the Notes.

     (d)  REDEMPTION AT THE OPTION OF THE COMPANY; ACCELERATION. The Notes will
be subject to redemption at any time at the option of the Company, in whole or
in part, upon not less than 30 nor more than 60 days' notice to each Holder of
Notes to be redeemed at its address appearing in the Security Register, at a
price equal to the sum of (i) the principal amount of the Notes being redeemed,
plus accrued and unpaid interest to but excluding the applicable Redemption
Date, plus (ii) the Make-Whole Amount, if any. If the notes are redeemed on or
after February 15, 2016, the redemption price will not include the Make-Whole
Amount. Upon the acceleration of the Notes in

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accordance with Section 502 of the Indenture, the Company shall pay the amount
specified in Section 4.2 of this Supplemental Indenture.

     (e)  NOTICES. All notices and other communications hereunder shall be in
writing and shall be deemed to have been duly given if mailed or transmitted by
any standard form of telecommunication. Notices to the Company shall be directed
to it at 400 Centre Street, Newton, Massachusetts 02458, Attention: President;
notices to the Trustee shall be directed to it at One Federal Street, 3rd Floor,
Boston, Massachusetts 02110, Attention: Corporate Trust Department, Re: HRPT
Properties Trust 6 1/4% Senior Notes due August 15, 2016; or as to either party,
at such other address as shall be designated by such party in a written notice
to the other party.

     (f)  GLOBAL NOTE LEGEND. Each Global Note shall bear the following legend
on the face thereof:

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

     (g)  APPLICABILITY OF DISCHARGE, DEFEASANCE AND COVENANT DEFEASANCE
PROVISIONS. The Discharge, Defeasance and Covenant Defeasance provisions in
Article Fourteen of the Indenture will apply to the Notes.

                                    ARTICLE 3

                              ADDITIONAL COVENANTS

     SECTION 3.1    In addition to the covenants of the Company set forth in
Article Ten of the Indenture, for the benefit of the holders of the Notes:

     (a)  LIMITATIONS ON INCURRENCE OF DEBT.

          (i)       The Company will not, and will not permit any Subsidiary to,
     incur any Debt if, immediately after giving effect to the incurrence of
     such additional Debt and the application of the proceeds thereof, the
     aggregate principal amount of all outstanding Debt of the Company and its
     Subsidiaries on a consolidated basis determined in accordance with GAAP is
     greater than 60% of the sum ("Adjusted Total Assets") of (without
     duplication) (A) the Total Assets of the Company and its Subsidiaries as of
     the end of the calendar quarter covered in the Company's Annual Report on
     Form 10-K, or the Quarterly Report on

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     Form 10-Q, as the case may be, most recently filed with the Securities and
     Exchange Commission (or, if such filing is not permitted under the
     Securities Exchange Act of 1934, as amended, with the Trustee) prior to the
     incurrence of such additional Debt and (B) the purchase price of any real
     estate assets or mortgages receivable acquired, and the amount of any
     securities offering proceeds received (to the extent that such proceeds
     were not used to acquire real estate assets or mortgages receivable or used
     to reduce Debt), by the Company or any Subsidiary since the end of such
     calendar quarter, including those proceeds obtained in connection with the
     incurrence of such additional Debt.

          (ii)      In addition to the foregoing limitations on the incurrence
     of Debt, the Company will not, and will not permit any Subsidiary to, incur
     any Secured Debt if, immediately after giving effect to the incurrence of
     such additional Secured Debt and the application of the proceeds thereof,
     the aggregate principal amount of all outstanding Secured Debt of the
     Company and its Subsidiaries on a consolidated basis is greater than 40% of
     Adjusted Total Assets.

          (iii)     In addition to the foregoing limitations on the incurrence
     of Debt, the Company will not, and will not permit any Subsidiary to, incur
     any Debt if the ratio of Consolidated Income Available for Debt Service to
     the Annual Debt Service for the four consecutive fiscal quarters most
     recently ended prior to the date on which such additional Debt is to be
     incurred shall have been less than 1.5 to 1.0, on a pro forma basis after
     giving effect thereto and to the application of the proceeds therefrom, and
     calculated on the assumption that (A) such Debt and any other Debt incurred
     by the Company and its Subsidiaries since the first day of such
     four-quarter period and the application of the proceeds therefrom,
     including to refinance other Debt, had occurred at the beginning of such
     period; (B) the repayment or retirement of any other Debt by the Company
     and its Subsidiaries since the first date of such four-quarter period had
     been repaid or retired at the beginning of such period (except that, in
     making such computation, the amount of Debt under any revolving credit
     facility shall be computed based upon the average daily balance of such
     Debt during such period); (C) in the case of Acquired Debt or Debt incurred
     in connection with any acquisition since the first day of such four-quarter
     period, the related acquisition had occurred as of the first day of such
     period with appropriate adjustments with respect to such acquisition being
     included in such pro forma calculation; and (D) in the case of any
     acquisition or disposition by the Company or its Subsidiaries of any asset
     or group of assets since the first day of such four-quarter period, whether
     by merger, stock purchase or sale, or asset purchase or sale, such
     acquisition or disposition or any related repayment of Debt had occurred as
     of the first day of such period with the appropriate adjustments with
     respect to such acquisition or disposition being included in such pro forma
     calculation. If the Debt giving rise to the need to make the foregoing
     calculation or any other Debt incurred after the first day of the relevant
     four-quarter period bears interest at a floating rate then, for purposes of
     calculating the Annual Debt Service, the interest rate on such Debt shall
     be computed on a pro forma basis as if the average interest rate which
     would have been in effect during the entire such four-quarter period had
     been the applicable rate for the entire such period.

     (b)  MAINTENANCE OF TOTAL UNENCUMBERED ASSETS. The Company and its
Subsidiaries will maintain at all times Total Unencumbered Assets of not less
than 200% of the aggregate

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outstanding principal amount of the Unsecured Debt of the Company and its
Subsidiaries on a consolidated basis.

                                    ARTICLE 4

                          ADDITIONAL EVENTS OF DEFAULT

     SECTION 4.1    For purposes of this Supplemental Indenture and the Notes,
in addition to the Events of Default set forth in Section 501 of the Indenture,
it shall also constitute an "Event of Default" if a default under any bond,
debenture, note or other evidence of indebtedness of the Company (including a
default with respect to any other series of securities), or under any mortgage,
indenture or other instrument of the Company under which there may be issued or
by which there may be secured or evidenced any indebtedness for money borrowed
by the Company (or by any Subsidiary, the repayment of which the Company has
guaranteed or for which the Company is directly responsible or liable as obligor
or guarantor) having an aggregate principal amount outstanding of at least
$20,000,000, whether such indebtedness now exists or shall hereafter be incurred
or created, which default shall have resulted in such indebtedness becoming or
being declared due and payable prior to the date on which it would otherwise
have become due and payable, without such indebtedness having been discharged,
or such acceleration having been rescinded or annulled, within a period of ten
days after there shall have been given, by registered or certified mail, to the
Company by the Trustee or to the Company and the Trustee by the Holders of at
least 25% in principal amount of the outstanding Notes, a written notice
specifying such default and requiring the Company to cause such indebtedness to
be discharged or cause such acceleration to be rescinded or annulled and stating
that such notice is a "Notice of Default" hereunder.

     SECTION 4.2    Notwithstanding any provisions to the contrary in the
Indenture, upon any acceleration of the Notes under Section 502 of the
Indenture, the amount immediately due and payable in respect of the Notes shall
equal the Outstanding principal amount thereof, plus accrued and unpaid interest
thereon, plus, if such acceleration occurs prior to February 15, 2016, the
Make-Whole Amount.

                                    ARTICLE 5

                                  EFFECTIVENESS

     This Supplemental Indenture shall be effective for all purposes as of the
date and time this Supplemental Indenture has been executed and delivered by the
Company and the Trustee in accordance with Article Nine of the Indenture. As
supplemented hereby, the Indenture is hereby confirmed as being in full force
and effect.

                                    ARTICLE 6

                                  MISCELLANEOUS

     SECTION 6.1    In the event any provision of this Supplemental Indenture
shall be held invalid or unenforceable by any court of competent jurisdiction,
such holding shall not invalidate or render unenforceable any other provision
hereof or any provision of the Indenture.

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     SECTION 6.2    To the extent that any terms of this Supplemental Indenture
or the Notes are inconsistent with the terms of the Indenture, the terms of this
Supplemental Indenture or the Notes shall govern and supersede such inconsistent
terms.

     SECTION 6.3    This Supplemental Indenture shall be governed by and
construed in accordance with the laws of The Commonwealth of Massachusetts.

     SECTION 6.4    This Supplemental Indenture may be executed in several
counterparts, each of which shall be an original and all of which shall
constitute but one and the same instrument.

                  [Remainder of page intentionally left blank.]

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     IN WITNESS WHEREOF, the Company and the Trustee have caused this
Supplemental Indenture to be executed as an instrument under seal in their
respective corporate names as of the date first above written.

                                  HRPT PROPERTIES TRUST

                                  By:
                                      ------------------
                                      Name:
                                      Title:

                                  U.S. BANK NATIONAL ASSOCIATION,
                                  as Trustee

                                  By:
                                      ------------------
                                      Name:
                                      Title:

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                                                                       EXHIBIT A

                                  FORM OF NOTE

                                 [FACE OF NOTE]

                      6 1/4% Senior Note due August 15, 2016

No. R-___                                                              $________

                              HRPT PROPERTIES TRUST

promises to pay to ________________________ or registered assigns, the principal
sum of ________________________ ($_______) on August 15, 2016, subject to
the terms set forth on the reverse of this Note and the terms of the Indenture
referred to therein.

     Interest Payment Dates: each February 15 and August 15, commencing February
15, 2005.

     Record Dates: the day falling 14 calendar days prior to any Interest
Payment Date.

CUSIP No.: ______________

                                      HRPT PROPERTIES TRUST

                                      By:
                                         ----------------------------
                                         Name:
                                         Title:

Attest:
       ----------------------------
[SEAL]

CERTIFICATE OF AUTHENTICATION

Dated:

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

U.S. BANK NATIONAL ASSOCIATION, as Trustee

By:
   -------------------------------
   Authorized Officer

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             [THE FOLLOWING CONSTITUTES THE REVERSE OF THE SECURITY]

                              HRPT PROPERTIES TRUST

                    6 1/4 % Senior Note due August 15, 2016

     Capitalized terms used herein have the meanings assigned to them in the
Indenture (as defined below) unless otherwise indicated.

     1.   INTEREST. HRPT Properties Trust, a Maryland real estate investment
trust (the "Company"), promises to pay interest on the principal amount of this
Note at the rate and in the manner specified below.

     The Company shall pay in cash interest on the principal amount of this Note
at the rate per annum of 6 1/4%. The Company will pay interest semiannually in
arrears on each February 15 and August 15, commencing February 15, 2005, or, if
any such day is not a Business Day (as defined in the Indenture), on the next
succeeding Business Day (each an "Interest Payment Date"), to Holders of record
on the day falling 14 calendar days immediately preceding such Interest Payment
Date (whether or not a Business Day).

     Interest will be computed on the basis of a 360-day year consisting of
twelve 30-day months. Interest shall accrue from the most recent date to which
interest has been paid or, if no interest has been paid, from August 5, 2004.

     2.   METHOD OF PAYMENT. The Company will pay interest on the Notes (except
defaulted interest) to the Persons who are registered Holders of Notes at the
close of business on the record date next preceding the Interest Payment Date,
even if such Notes are canceled after such record date and on or before such
Interest Payment Date. The Company will pay principal and interest in money of
the United States that at the time of payment is legal tender for payment of
public and private debts. The Company, however, may pay principal, premium, if
any, and interest by check payable in such money. It may mail an interest check
to a Holder's registered address.

     3.   INDENTURE. The Company issued the Notes under an Indenture, dated as
of July 9, 1997, and a Supplemental Indenture No. 14 thereto, dated as of August
5, 2004 (collectively, the "Indenture"), between the Company and the Trustee.
The terms of the Notes include those stated in the Indenture and those made part
of the Indenture by reference to the Trust Indenture Act of 1939 as in effect on
the date of the Indenture. The Notes are subject to all such terms, and Holders
of the Notes are referred to the Indenture and such Act for a statement of such
terms. The terms of the Indenture shall govern any inconsistencies between the
Indenture and the Notes. The Notes are unsecured general obligations of the
Company limited to $400,000,000 in aggregate principal amount, except as
otherwise provided in the Indenture.

     4.   OPTIONAL REDEMPTION. The Notes will be subject to redemption at any
time at the option of the Company, in whole or in part, upon not less than 30
nor more than 60 days' notice, at a redemption price equal to the sum of (i) the
principal amount of the Notes being redeemed, plus accrued and unpaid interest
to but excluding the applicable Redemption Date and (ii) the Make-Whole Amount,
if any. If the Notes are redeemed on or after February 15, 2016, the redemption
price will not include the Make-Whole Amount.

                                       A-2
<Page>

     As used herein the term "Make-Whole Amount" means, in connection with any
optional redemption or accelerated payment of any notes prior to February 15,
2016, the excess, if any, of (i) the aggregate present value as of the date of
such redemption or accelerated payment of each dollar of principal being
redeemed or paid and the amount of interest (exclusive of interest accrued to
the date of redemption or accelerated payment) that would have been payable in
respect of such dollar if such redemption or accelerated payment had been made
on February 15, 2016, determined by discounting, on a semiannual basis, such
principal and interest at the Reinvestment Rate (determined on the third
Business Day preceding the date such notice of redemption is given or
declaration of acceleration is made) from the respective dates on which such
principal and interest would have been payable if such redemption or accelerated
payment had been made on February 15, 2016, over (ii) the aggregate principal
amount of the Notes being redeemed or paid. In the case of any redemption or
accelerated payment of notes on or after February 15, 2016, the Make-Whole
Amount means zero. For purposes of the Indenture and the Notes, references in
the Indenture to the payment of the principal (and premium, if any) and interest
on the Notes shall be deemed to include the payment of the Make-Whole Amount, if
any, due upon redemption with respect to the Notes. The Make-Whole Amount shall
be calculated by the Company and set forth in an Officer's Certificate delivered
to the Trustee, and the Trustee shall be entitled to rely on said Officer's
Certificate.

     As used herein the term "Reinvestment Rate" means a rate per annum equal to
the sum of 0.30% (thirty one-hundredths of a percent) plus the yield on treasury
securities at constant maturity under the heading "Week Ending" published in the
Statistical Release (as defined herein) under the caption "Treasury Constant
Maturities" for the maturity (rounded to the nearest month) corresponding to the
remaining life to maturity (which, in the case of maturities corresponding to
the principal and interest due on the notes at their maturity, shall be deemed
to be February 15, 2016), as of the payment date of the principal being redeemed
or paid. If no maturity exactly corresponds to such maturity, yields for the two
published maturities most closely corresponding to such maturity shall be
calculated pursuant to the immediately preceding sentence and the Reinvestment
Rate shall be interpolated or extrapolated from such yields on a straight-line
basis, rounding in each of such relevant periods to the nearest month. For
purposes of calculating the Reinvestment Rate, the most recent Statistical
Release published prior to the date of determination of the Make-Whole Amount
shall be used.

     As used herein the term "Statistical Release" means the statistical release
designated "H.15(519)" or any successor publication which is published weekly by
the Federal Reserve System and which establishes yields on actively traded
United States government securities adjusted to constant maturities or, if such
statistical release is not published at the time of any determination under the
Supplemental Indenture, then any publicly available source of similar market
data which shall be designated by the Company.

     5.   MANDATORY REDEMPTION. The Company shall not be required to make
sinking fund or redemption payments with respect to the Notes.

     6.   NOTICE OF REDEMPTION. Notice of redemption shall be mailed at least 30
days but not more than 60 days before the Redemption Date to each Holder of
Notes to be redeemed at its registered address. Notes may be redeemed in part
but only in whole multiples of $1,000, unless all of the Notes held by a Holder
are to be redeemed. On and after the redemption date, interest

                                       A-3
<Page>

ceases to accrue on Notes or portions of them called for redemption.

     7.   DENOMINATIONS, TRANSFER, EXCHANGE. The Notes are in registered form
without coupons in denominations of $1,000 and integral multiples of $1,000 in
excess thereof. The transfer of Notes may be registered and Notes may be
exchanged as provided in the Indenture. The Security Registrar and the Trustee
may require a Holder, among other things, to furnish appropriate endorsements
and transfer documents and to pay any taxes and fees required by law or
permitted by the Indenture. The Security Registrar need not exchange or register
the transfer of any Note or portion of a Note selected for redemption. Also, it
need not exchange or register the transfer of any Notes for a period of 15 days
before the mailing of a notice of redemption of Notes, or during the period
between a record date and the corresponding Interest Payment Date.

     8.   DEFAULTS AND REMEDIES. In case an Event of Default (as defined in the
Indenture) with respect to the Notes shall have occurred and be continuing, the
principal hereof may be declared, and upon such declaration shall become, due
and payable, in the manner, with the effect and subject to the provisions
provided in the Indenture.

     9.   ACTIONS OF HOLDERS. The Indenture contains provisions permitting the
holders of not less than a majority of the aggregate principal amount of the
outstanding Notes, subject to certain exceptions as provided in the Indenture,
on behalf of the holders of all such Notes at a meeting duly called and held as
provided in the Indenture, to make, give or take any request, demand,
authorization, direction, notice, consent, waiver or other action provided in
the Indenture to be made, given or taken by the holders of the Notes, including
without limitation, waiving (a) compliance by the Company with certain
provisions of the Indenture, and (b) certain past defaults under the Indenture
and their consequences. Any resolution passed or decision taken at any meeting
of the holders of the Notes in accordance with the provisions of the Indenture
shall be conclusive and binding upon such holders and upon all future holders of
this Note and other Notes issued upon the registration of transfer hereof or in
exchange heretofore or in lieu hereof.

     10.  PERSONS DEEMED OWNERS. The Company, the Trustee, and any agent of the
Company or the Trustee may deem and treat the Person in whose name this Note is
registered on the Security Register as its absolute owner for all purposes.

     11.  AUTHENTICATION. This Note shall not be valid until authenticated by
the manual signature of the Trustee or an authenticating agent.

     12.  GOVERNING LAW. THE INTERNAL LAW OF THE COMMONWEALTH OF MASSACHUSETTS
SHALL GOVERN AND BE USED TO CONSTRUE THE INDENTURE AND THE NOTES.

     13.  NO PERSONAL LIABILITY. THE AMENDED AND RESTATED DECLARATION OF TRUST
OF THE COMPANY, DATED JULY 1, 1994, A COPY OF WHICH, TOGETHER WITH ALL
AMENDMENTS AND SUPPLEMENTS THERETO (THE "DECLARATION"), IS DULY FILED IN THE
OFFICE OF THE DEPARTMENT OF ASSESSMENTS AND TAXATION OF THE STATE OF MARYLAND,
PROVIDES THAT THE NAME "HRPT PROPERTIES TRUST" REFERS TO THE TRUSTEES UNDER THE
DECLARATION COLLECTIVELY AS TRUSTEES, BUT NOT INDIVIDUALLY OR PERSONALLY, AND
THAT NO TRUSTEE,

                                       A-4
<Page>

OFFICER, SHAREHOLDER, EMPLOYEE OR AGENT OF THE COMPANY SHALL BE HELD TO ANY
PERSONAL LIABILITY, JOINTLY OR SEVERALLY, FOR ANY OBLIGATION OF, OR CLAIM
AGAINST, THE COMPANY. ALL PERSONS DEALING WITH THE COMPANY, IN ANY WAY, SHALL
LOOK ONLY TO THE ASSETS OF THE COMPANY FOR THE PAYMENT OF ANY SUM OR THE
PERFORMANCE OF ANY OBLIGATION.

     The Company will furnish to any Holder upon written request and without
charge a copy of the Indenture. Request may be made to:

     HRPT Properties Trust
     400 Centre Street
     Newton, MA 02458
     Telecopier No.: (617) 332-2261
     Attention: President

or such other address as the Company may specify pursuant to the Indenture.

                                       A-5
<Page>

                                 ASSIGNMENT FORM

                  To assign this Note, fill in the form below:

[I] [We] assign and transfer this Note to
___________________________________________________________________________
[PRINT OR TYPE ASSIGNEE'S NAME, ADDRESS AND ZIP CODE]
__________________________________ [INSERT ASSIGNEE'S SOC. SEC. OR TAX I.D. NO.]
and irrevocably appoint_________________________________________________________
to transfer this Note on the books of the Company. 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:

--------------------------
[THE SIGNATURE MUST BE GUARANTEED BY
AN OFFICER OF A PARTICIPANT IN A RECOGNIZED
SIGNATURE GUARANTEE PROGRAM. NOTARIZED
OR WITNESSED SIGNATURES ARE NOT ACCEPTABLE.]

                                       A-6Exhibit
10.4

 

MANAGEMENT AGREEMENT

 

MANAGEMENT
AGREEMENT (this “Agreement”), dated as of April 30, 2001 by and
among Sterling Investment Partners Advisors, LLC, a Delaware limited liability
company (“Sterling”), KTC/AMG Holdings Corp., a Delaware corporation to
be renamed The Kenan Advantage Group, Inc., (“Parent”), Advantage
Management Group, Inc., an Ohio corporation (“AMG”), and KTC Acquisition
Corp., a North Carolina corporation to be merged with and into Kenan Transport
Company, with Kenan Transport to be the surviving corporation in the merger (“Kenan”
and, collectively with Parent and AMG, the “Company”).

 

BACKGROUND:

 

The Company
desires to receive financial and management consulting services from Sterling,
and thereby obtain the benefit of the experience of Sterling in business and
financial management generally and its knowledge of the Company’s financial
affairs in particular.  Sterling is
willing to provide financial and management consulting services to the
Company.  Accordingly, the compensation
arrangements set forth in this Agreement are designed to compensate Sterling
for such services.

 

NOW, THEREFORE, in
consideration of the foregoing premises and the respective agreements
hereinafter set forth and the mutual benefits to be derived herefrom, Sterling
and the Company hereby agree as follows:

 

TERMS:

 

1.                                       Engagement.  The Company
hereby engages Sterling as a financial and management consultant, and Sterling
hereby agrees to provide financial and management consulting services to the
Company, all on the terms and subject to the conditions set forth below.

 

2.                                       Services of Sterling. 
Sterling hereby agrees during the term of this engagement to consult
with the Company’s Board of Directors (the “Board”) and management of
the Company in such manner and on such business and financial matters as may be
reasonably requested from time to time by the Board, including but not limited
to:

 

(i)                                     developing and implementing corporate
strategy;

 

(ii)                                  budgeting future corporate investments;

 

(iii)                               developing acquisition and divestiture
strategies; and

 

(iv)                              subsequent debt and equity financings.

 

In addition to the business and financial consulting services set forth
above, officers and employees of Sterling will be available to serve on the
Board, without additional compensation, and will devote such time and attention
to the Company’s affairs as Sterling determines reasonably necessary to
accomplish the purposes of this Agreement.

 

3.                                       Compensation.

 

(a)                                  The Company agrees to pay to Sterling as
compensation for services to be rendered by Sterling hereunder a fee equal to
$150,000 per year (the “Annual Fee”), payable quarterly in advance, in
four equal installments of $37,500 on each January 1, April 1,
July 1 and October 1 of each year.

 

 

Notwithstanding the foregoing,
in the event there exists any default by the Company in the payment of
principal or interest on (i) AMG’s or Kenan’s outstanding revolving credit or
term loans from its senior bank lenders, or (ii) AMG’s or Kenan’s senior
subordinated notes, the Annual Fee shall not be paid, but shall accrue (without
interest) until such payment default is cured or waived, at which time the
accrued but unpaid Annual Fee shall be paid to Sterling.  The Company shall reimburse Sterling for
such reasonable travel expenses and other direct out-of-pocket expenses as may
be incurred by Sterling and its employees in connection with the rendering of
services hereunder.  The Company will,
within 30 days after receipt of expense reports, reimburse Sterling for such
expenses.  On the date hereof the
Company shall pay Sterling $25,000, representing the pro rata portion of the
Annual Fee due for the period beginning on the date hereof and ending
June 30, 2001.

 

(b)                                 In the event that Sterling assists the
Company in any equity or debt financing for purposes of financing an
acquisition by the Company (and not in a transaction that results in a sale of
the Company) or Company growth, whether public or private, the Company will pay
Sterling a fee of (i) three quarters of one percent (0.75%) of the gross
proceeds received by the Company in any equity financing (the “Equity
Financing Fee”) and (ii) one-quarter of one percent (0.25%) of the gross
proceeds of any debt financing (the “Debt Financing Fee”).  For purposes hereof, (i) any offering of
debt securities which is convertible into or exchangeable for equity securities
shall be considered an equity financing and (ii) with respect to any offering
consisting of a combination of debt and equity securities, the proceeds shall
be allocated among the debt and equity securities sold based on the fair market
value thereof, and the Company shall pay to Sterling the Equity Financing Fee
with respect to the gross proceeds allocated to the equity securities sold (to
the extent such fee is payable in accordance with the first sentence hereof)
and the Debt Financing Fee with respect to the gross proceeds allocated to the
debt securities sold.

 

(c)                                  In the event that Sterling assists the
Company in any acquisition, the Company will pay Sterling a fee of five-eighths
of one percent (0.625%) of the transaction value of the acquisition.

 

(d)                                 Notwithstanding anything herein to the
contrary, Sterling shall only be entitled to one fee in respect of a
transaction or series of related transactions which involves both a financing
and an acquisition, which fee shall be reduced by any financing or transaction
fee payable to an investment banking firm engaged to provide investment banking
services to the Company, it being understood that any crediting of such fee shall
be pro rata between this Agreement and the Management Agreement, dated as of
the date hereof, among the Company and RFE Management Corporation.

 

(e)                                  Sterling acknowledges that payments to it
by the Company pursuant to this Agreement are subject to the provisions of
Section 9.18 of that certain Credit Agreement, dated as of the date
hereof, by and among the Company, the institutions from time to time party
thereto as lenders, CIBC World Markets Corp., as Sole Lead Arranger and Book
Manager and Canadian Imperial Bank of Commerce, as Administrative Agent, the
provisions of Section 7.6 of that certain Note Purchase Agreement, dated
as of the date hereof, among AMG, KTC Acquisition Corp. and the purchasers
named therein, and the provisions of Section 4.04 of that certain Warrant
Purchase Agreement, dated as of the date hereof, between Parent and the
purchasers named therein (the “Warrant Purchase Agreement”).

 

4.                                       Term.  This
Agreement shall commence on the date hereof and shall continue in effect for an
initial term of three years and thereafter shall be automatically renewed for
successive one-year terms as long as the stockholders of Parent on the date
hereof (other than stockholders who are employees of the Company) own at least
20% of the outstanding Common Stock (assuming conversion of all outstanding
preferred stock) of Parent; provided, however, that this Agreement (other than
as provided in the last sentence of this Section 4) shall automatically be
terminated prior to the initial term hereof (i) in the event that following a
Qualifying Public Offering (as such term is defined in the Warrant Purchase
Agreement) no Sterling Principal (as such term is defined in the Warrant
Purchase Agreement) remains a

 

2

 

director of the Parent or
(ii) in connection with the sale of the Company or all or substantially all of
the assets of the Company and its subsidiaries (including, without limitation,
pursuant to a merger, consolidation or other transaction in which the stockholders
of Parent immediately prior to the transaction own less than a majority of the
voting power of the surviving entity) upon payment in full of all amounts (the
“Remaining Term Amount”) that would have been paid to Sterling during
the remaining term of the Agreement. 
Notwithstanding the foregoing, in the event this Agreement is terminated
prior to the end of the initial term pursuant to clause (ii) of the proviso to
the immediately preceding sentence and the holders of the Founders’ Preferred
Stock (as such term is defined in the Certificate of Designations of the
Parent’s Preferred Stock) on the date of this Agreement (after giving effect to
the purchase of shares of Series B Convertible Preferred Stock pursuant to the
Stockholders’ Agreement, dated as of the date hereof, between the Parent and
the other signatories thereto (the “Stock Purchase”)), do not receive in
the transaction resulting in the termination of this Agreement in respect of
the shares of Parent capital stock owned by them on the date of this Agreement
(after giving effect to the Stock Purchase) consideration equal to or greater
than twice the purchase price of such shares, then Sterling shall cause the
Remaining Term Amount to be paid to all holders of preferred stock, common
stock and warrants outstanding on the date hereof (including without limitation
Sterling Investment Partners, L.P.) in accordance with the provisions of
Sections 2 and 3 of the Certificate of Designations for Parent’s Preferred
Stock.  No termination of this Agreement,
whether pursuant to this paragraph or otherwise, shall affect the Company’s
obligations with respect to the fees, costs and expenses incurred by Sterling
in rendering services hereunder and not reimbursed by the Company as of the
effective date of such termination or the Company’s obligations under
Section 5.

 

5.                                       Indemnification. 
Parent, AMG and Kenan, jointly and severally, agree to indemnify and
hold harmless Sterling, its members, affiliates, employees and agents against
and from any and all loss, liability, suits, claims, costs, damages and
expenses (including attorneys’ fees) arising from their performance hereunder,
except as a result of their gross negligence or intentional wrongdoing;
provided, however, that neither Sterling nor its members, affiliates, employees
or agents shall be entitled to indemnification in respect of any loss of value
of the securities of the Parent owned by them.

 

6.                                       Sterling an Independent Contractor. 
Sterling and the Company agree that Sterling shall perform services
hereunder as an independent contractor, retaining control over and
responsibility for its own operations and personnel.  Neither Sterling nor its members, affiliates, employees and
agents shall be considered employees or agents of the Company nor shall any of
them have authority to contract in the name of or bind the Company, except as
expressly agreed to in writing by the Company. 
This Agreement in no way limits the ability of Sterling to engage in any
other activities.

 

7.                                       Confidential Information. 
Sterling acknowledges that the information, observations and data
obtained by it and its agents and employees during the course of its
performance under this Agreement concerning the business plans and financial
data of the Company (the “Confidential Data”) are the Company’s
valuable, special and unique assets. 
Therefore, it agrees that it will not, nor will it permit any of its
agents or employees to, disclose to any unauthorized person any of the
Confidential Data obtained by it during the course of Sterling’s performance
under this Agreement without the Company’s prior written consent, unless and to
the extent that (i) the Confidential Data becomes generally known to and
available for use by the public otherwise than as a result of its acts or
omissions to act or (ii) such disclosure is required by any statute, rule,
regulation or law or any judicial or administrative body having
jurisdiction.  Nothing in this
section shall preclude Sterling Investment Partners, L.P. from disclosing
Confidential Data to its limited partners pursuant to its standard procedures
for disclosure of confidential information to its limited partners.

 

8.                                       Notice.  Any notice,
report or payment required or permitted to be given or made under this
Agreement by one party to the other shall be deemed to have been duly given or
made when

 

3

 

delivered, if personally
delivered, when transmitted, if sent by confirmed facsimile transmission, or,
if mailed, when mailed by registered or certified mail, return receipt
requested, postage prepaid, to the party at the following addresses (or at such
other address as shall be given in writing by one party to the other):

 

	
  If to Sterling:

  	
  Sterling Investment
  Partners Advisors LLC

  276 Post Road West

  Westport, Connecticut 06880-4703

  Attention:  Chairman

  
	
   

  	
   

  
	
  If to the Company:

  	
  KTC/AMG Holdings Corp.

  4985 Dressler Road, NW, #100

  Canton, Ohio  44718

  Attention: Chief Executive Officer

  

 

9.                                       Entire Agreement; Modification. 
This Agreement (a) contains the complete and entire understanding and
agreement of the Company and Sterling with respect to the subject matter
hereof; (b) supersedes all prior and contemporaneous understandings, conditions
and agreements, oral or written, express or implied, respecting the engagement
of Sterling in connection with the subject matter hereof; and (c) may not be
modified except by an instrument in writing executed by the Company and
Sterling.

 

10.                                 Waiver and Breach. 
The waiver by either party of a breach of any provision of this Agreement
by the other party shall not operate or be construed as a waiver of any
subsequent breach of that provision or any other provision hereof.

 

11.                                 Assignment.  Neither the
Company nor Sterling may assign its rights or obligations under this Agreement without
the express written consent of the other.

 

12.                                 Governing Law. 
This Agreement shall be deemed to be a contract made under, and is to be
governed and construed in accordance with, the laws of the State of Ohio,
without application of the conflicts of laws principles thereof.

 

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

 

4

 

IN WITNESS WHEREOF,
Parent, AMG, Kenan and Sterling have caused this Agreement to be duly executed
and delivered on the date and year first above written.

 

 

	
   

  	
  KTC/AMG HOLDINGS CORP.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By:

  	
  /s/

  
	
   

  	
  Its:

  	
   

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  ADVANTAGE MANAGEMENT
  GROUP, INC.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By:

  	
  /s/

  
	
   

  	
  Its:

  	
   

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  KTC ACQUISITION CORP.

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By:

  	
  /s/

  
	
   

  	
  Its.

  	
   

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  STERLING INVESTMENT
  PARTNERS

  ADVISORS LLC

  
	
   

  	
   

  
	
   

  	
   

  
	
   

  	
  By:

  	
  /s/

  
	
   

  	
  Its:  Managing Member

  

 

5

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