Document:

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                                                                   EXHIBIT 10.15

                                                           [ENGLISH TRANSLATION]

                               GUARANTEE CONTRACT

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                         Contract No: (2005) Eximbank (Jing Xinbao) Zi No. 15069

This Guarantee Contract is entered into by and between the following parties on
September __, [INFORMATION MISSING IN THE ORIGINAL DOCUMENT] 2005:

Guarantor: Baoding Tianwei Baobian Electric Co., Ltd. (hereinafter referred to
as "Guarantor")

Legal Representative: Ding Qiang

Address: No. 28 Jingxiu Street, National High-tech Development District,
Baoding, Heibei

Mail Code: 071051

Tel: 0312-3308417

Fax: 0312-3230382

Lender: Export-Import Bank of China (hereinafter the "Lender")

Legal Representative: Li Ruogu

Address: No. 77 Beiheyan Avenue Dongcheng District, Beijing

Mail Code: 100009

Tel: 010-64099690

Fax: 010-64099687

Whereas, the Lender entered into a Loan Contract for Seller Credit in Export of
Normal Electromechanical Products and High-tech Products numbered as (2005)
Ex-Im Bank (Jing Xinhe) Zi No. 15069 (hereinafter the "Loan Contract") on
September __, [INFORMATION MISSING IN THE ORIGINAL DOCUMENT] 2005 with Baoding
Tianwei Yingli New Energy Resources Co., Ltd. (hereinafter the "Borrower"), to
extend to the Borrower a loan in amount to (V) Y40 million yuan ((in words)
Renminbi forty million yuan) (X) US$ ((in words) US dollar ____ [INFORMATION
MISSING IN THE ORIGINAL DOCUMENT]) (the "Loan"). In accordance with the Loan
Contract, the Borrower shall obtain a third party's guarantee for its debt under
the Loan Contract and such guarantee is a precondition for the Lender to extend
aforesaid loan to the debtor. Upon discussion, the Lender and the Guarantor
agree to enter this Guarantee Contract.

     Article 1. The Guarantor agrees to provide joint-liability guarantee for
the debt of the Borrower under the Loan Contract in accordance with this
Guarantee Contract to guarantee (V) the whole debt of the Borrower under the
Loan Contract (X)__% [INFORMATION MISSING IN THE ORIGINAL DOCUMENT] debt of the
Borrower under the Loan Contract, that is, the (V) Y (X) US$ forty million
principal and interest thereof of the Borrower under Loan Contract.

     Article 2. The secured scope of the Guarantor under this Guarantee includes
the following two items (hereinafter referred to as the "Debt"):

     a. the principal, interest (including statutory interest, promissory
interest and penalty interest), liquidated damage, compensation for damage and
expenses for enforcement of credit claim (including litigation fee, lawyer fee,
notarization fee and enforcement fee) that shall be repaid by the Borrower to
the Lender under the Loan Contract; and

     b. any other expense payable by the Borrower to the Lender under the Loan
Contract.

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     Article 3. In case that the Borrower fails to pay any payable Debt on time
(including but not limited to any amount payable by the Borrower when the Lender
announces earlier maturity of the Loan), the Guarantor shall, within fifteen
days upon receiving written payment notice from the Lender, unconditionally pay
such Debt in the manner as required by the Lender.

     Article 4. Unless there are any apparent error, any proof used by the
Lender to indicate any Debt or any payable amount under this Guarantee Contract
shall be the final evidence for the credit-debt relationship between the parties
and binding on the Guarantor.

     Article 5. Once upon request by the Lender, the Guarantor shall compensate
the following expenses and losses of the Lender:

     a. all expenses occurred by the Lender to implement its rights under this
Guarantee Contract; and

     b. any other losses caused to the Lender due to the Guarantor's breach of
any term of this Guarantee Contract.

     Article 6. If the Guarantor fails to pay any amount under this Guarantee
Contract on time as required by the Lender, the Lender shall have the right to
directly debit from any account of the Guarantor with the Lender or any branch
of the Lender's agent bank at any time, without previous consent of the
Guarantor.

     Article 7. The guarantee period under this Guarantee Contract is two years
commencing from the date when all debt paying deadline under the Loan Contract
matures.

     Article 8. The Guarantor and the Lender hereby specifically agree that in
the extent as allowed by law, if there is other security of property for the
credit claim secured by this Guarantee Contract, under any circumstance, the
Guarantor may not require the Lender to exercise the security of property.

     Article 9. The Guarantor makes the following representation to the Lender:

     a. the Guarantor is a enterprise legal person organized according to law
and existing validly and has independent legal person status. The Guarantor has
full qualification and rights to execute this Guarantee Contract and perform its
obligations under this Guarantee Contract;

     b. the Guarantor always operates its business in compliance with law and
has never taken any action that is beyond its business scope as confirmed by
industry and commerce administration authority;

     c. the Guarantor has carefully read and completely understood and accepted
the content of the Loan Contract and this Guarantee Contract; the Guarantor is
voluntary to execute and implement

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this Guarantee Contract and all of its intent expression is real;

     d. the Guarantor hereby specifically asserts that it has fully knowledge
that Headquarter Business Department of Export-Import Bank of China is
authorized by the Lender to be responsible for extension, collection of the Loan
and all matters related to management of the Loan. The Loan Contract is binding
directly on the Borrower and the Lender and this Guarantee Contract is binding
directly on the Guarantor and the Lender;

     (X) the Guarantor hereby specifically asserts that (X) Y (X) US$_______
[INFORMATION MISSING IN THE ORIGINAL DOCUMENT] of the Loan under the Loan
Contract is used to (X) repay the unpaid amount of the Borrower under the loan
contract (contract no: (__________) Ex-im Bank (Xinhe) Zi No. __________)
[INFORMATION MISSING IN THE ORIGINAL DOCUMENT] entered into by the Lender and
the Borrower on __, ____. [INFORMATION MISSING IN THE ORIGINAL DOCUMENT] (X)
repay the bridge loan extended by (__________) Bank [INFORMATION MISSING IN THE
ORIGINAL DOCUMENT];

     e. the Guarantor confirms that corporate authorization necessary for
executing this Guarantee Contract on the party of the Guarantor has been
fulfilled and this Guarantee Contract has been validly signed by authorized
representative of the Guarantor;

     f. execution of this contract and performance of its obligations under this
Guarantee Contract by the Guarantor is not in violence of the following:

     1. articles of association of the Guarantor;

     2. any other agreements entered into by the Guarantor; or

     3. any law and regulation applicable to the Guarantor.

     g. this Guarantee Contract constitutes legal valid and legally binding
obligation of the Guarantor;

     h. the Guarantor is in good financial condition and has the ability to
provide guarantee for the Debt of the Borrower under the Loan Contract. Its
financial condition is not and will not be negatively affected by any
arbitration, litigation or administrative proceeding to be started;

     i. the financial reports provided by the Guarantor are prepared in
accordance with accounting principals enacted by the Ministry of Finance and
truly and properly reflect financial condition of the Guarantor in the year of
such statement. In addition, after the latest reporting date, the financial
condition of the Guarantor is not worsening; and

     j. all documents, materials, statements and certificates provided by the
Guarantor to the Lender are correct, true, complete and valid, and photocopies
of documents provided are consistent with the originals.

     Article 10. The Guarantor makes the following warranty to the Lender:

     a. until any Debt under the Loan Contract has been fully paid off, without
previous written

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consent of the Lender, the Guarantor may not take any contracting, leasing,
merger, split-up, joint-stock restructure or other changing arrangement of
operation and property right structure; if contracting, leasing, merger,
split-up, joint-stock restructure or otherwise changing of operation and
property right structure is necessary due to operation need or adjustment of
State policy or law, the Guarantor shall obtain consent of the Lender first and
make arrangement satisfactory to the Lender for its guarantee liability and
obligation under this Guarantee Contract;

     b. if the Guarantor makes any changing registration with the State industry
and commerce administration authority, it shall notify the Lender immediately
and furnish the Lender with the copy of relevant registration documents;

     c. until any Debt under the Loan Contract has been fully paid off, without
previous written consent of the Lender, the Guarantor may not make any change or
amendment to the its shareholding, articles of association or other corporate
documents that may materially affect its ability to guarantee under this
Guarantee Contract; and

     d. as long as there are any Debt of the Borrower under the Loan Contract
not paid off, without previous written consent of the Lender, the Guarantor may
not ask for recourse from or claim against the Borrower for any amount it has
paid to the Lender for the Borrower (including the Debt under the Guarantee
Contract and debt under other contracts).

     Article 11. This Guarantee Contract is a contract independent from the Loan
Contract. The invalidity or rescission of the Loan Contract due to any reason
will neither affect the effect of this Guarantee Contract, nor affect the
obligation and liability of the Guarantor under this Guarantee Contract. In
addition, this Guarantee Contract will not be invalid or rescinded due to the
invalidity or rescission of the Loan Contract.

     Article 12. If the Lender and the Borrower agree to make amendment to the
Loan Contract which extends the Loan, increases the amount of the Loan or
otherwise increases liability of the Guarantor, the Guarantor's written consent
shall be obtained in advance.

     Article 13. Without previous consent of the Guarantor, the Lender may
transfer the credit claim secured by this Guarantee Contract to any third party
and the Guarantor will continue bear guarantee liability in the original
guarantee scope.

     Article 14. Without consent of the Lender, the Guarantor shall not transfer
or otherwise dispose all or part of its liability or obligation under this
Guarantee Contract.

     Article 15. Under this Guarantee Contract, the Guarantor shall fully pay
any amount payable by it without any offsetting request or any accessory
condition.

     Article 16. Any tolerance, extension of deadline, preference or delay given
by the Lender for the Borrower's performance of its obligation under the Loan
Contract or the Guarantor's performance of its obligation under this Guarantee
Contract may not affect, harm or limit all rights

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of the Lender in accordance with this Guarantee Contract and laws or
regulations, may not be deemed as waiver of the Lender of its rights or
interests under this Guarantee Contract, nor may affect the liability and
obligation that the Guarantee shall bear under this Guarantee Contract.

     Article 17. This Guarantee Contract may be amended or supplemented upon
written agreement of both parties. Any amendment and supplementary to this
Guarantee Contract shall constitute a part of this Guarantee Contract.

     Article 18. The notices and requests sent by both parties of this Guarantee
Contract to each other and related to this Guarantee Contract shall be in
writing and sent to relevant party's address as set forth on the first page of
this Guarantee Contract. If any party changes its address, such party shall
notify the other at a timely basis.

     Article 19. This Guarantee Contract is governed by and construed according
to law of People's Republic of China.

     Article 20. All disagreements or disputes arising from performance of this
Guarantee Contract or relevant with this Guarantee Contract may be solved by
negotiation between the parties. In failure to negotiate, any party may sue to
people's court of Beijing having jurisdiction. The Guarantor agrees that
litigation arising from performance of this Guarantee Contract or relevant with
this Guarantee Contract may be brought to people's court of Beijing having
jurisdiction.

     Article 21. This Guarantee Contract shall come into effect upon signing and
stamping by both parties of the contract. This Guarantee Contract is executed in
four copies, two of which are kept by each of the Lender and the Guarantor
separately and each copy shall have the same legal effect.

Guarantor: Baoding Tianwei Baobian Electric Co., Ltd.
(corporate seal)

Legal Representative or authorized signer:

/s/ Jing Chongyou
-------------------------------------

Lender: Export-Import Bank of China
(corporate seal)

Legal Representative or authorized signer:

/s/ Jiang Junhua
-------------------------------------

Dated: September, 2005

Place: No. 77 Beiheyan Avenue, Dongcheng District, Beijing

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                                                                   EXHIBIT 10.16

                                                           [ENGLISH TRANSLATION]

PREPARED UNDER THE SUPERVISION OF HUAXIA BANK HEADQUARTERS

                        MAXIMUM AMOUNT GUARANTEE CONTRACT

================================================================================

                   SHIJIAZHUANG BRANCH, HUAXIA BANK CO., LTD.

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                        MAXIMUM AMOUNT GUARANTEE CONTRACT

                                                    No. : 0311006012005048 Bao 1

<TABLE>
<S>                           <C>
Party A (Guarantor):          Baoding Tianwei Baobian Electric Co., Ltd.

Address:                      318 Jiangcheng Road, Baoding

Zip Code:                     071056

Legal Representative:         Ding Qiang

Telephone:                    0312-3308895

Fax:                          0312-3308895

Basic Account Opening Bank:   Industrial and Commercial Bank of China, Baoding
                              Sub-branch Office

Bank Account:                 0409003809221002578-002

Party B (Creditor):           Huaxia Bank Co., Ltd., Shijiazhuang Branch

Address:                      48, Zhongshan West Road

Zip Code:                     050000

Legal Representative/
Responsible Person:           Mo Rongfen

Telephone:                    87899120

Fax:
</TABLE>

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          In accordance with the relevant provisions of the Guarantee Law of the
People's Republic of China, Party B will enter into several business contracts
with the debtor under the master contract (the "Master Contract"), Baoding
Tianwei Yingli New Energy Resources Co., Ltd. (the "Debtor"), during the period
set forth in this contract (this "Contract"), and Party A is willing to provide
a guarantee to Party B with respect to all creditor's rights under such business
contracts to the extent of the maximum amount of credit claim. Party A and Party
B hereby enter into this contract through consultation.

                                    ARTICLE I

        TYPE, AMOUNT AND PERIOD OF THE GUARANTEED PRINCIPAL CREDIT CLAIM

          1.1 The choice of the Master Contract under this Contract shall be as
follows:

     __________________ (No.:______) [INFORMATION MISSING IN THE ORIGINAL
     DOCUMENT] entered into by Party B and the Debtor, such contract and the
     specific business contracts thereunder shall constitute the Master Contract
     of this Contract.

     Several Letter of Credit Issuance Contracts and Loan Contracts entered into
     by Party B and the Debtor during the period set forth herein shall
     constitute the Master Contract of this Contract.

          1.2 The business type of the principal credit claim guaranteed by
Party A shall be the same as set forth in the Master Contract.

          1.3 The maximum amount of the principal of the principal credit claim
guaranteed hereunder shall be in Renminbi (currency) Thirty Eight Million Yuan
(in words) (among which, the business amount in any other currency shall be
converted based on the exchange rate quoted by Party B on the occurrence date of
such business).

          1.4 The execution date for any specific business contract guaranteed
hereunder shall be from August 24, 2005 to August 23, 2006.

          1.5 The Debtor's debt performance period shall be within the meaning
set forth in the Master Contract. If Debtor repay its debt in installments
pursuant to the Master Contract, the maturity date for each debt shall be the
expiration date of the performance period of such debt; If the Creditor declares
pursuant to the Master Contract that any debt becomes mature prior to its
maturity date, the premature date shall be the expiration date of the
performance period of such debt.

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                                   ARTICLE II

                               SCOPE OF GUARANTEE

          2.1 The scope of guarantee provided by Party shall cover the principal
and interest of the credit claim under the Master contract, default interest,
fine, compound interest, liquidated damages, damages, expenses incurred in
connection with the realization of the credit claim by Party B (including, but
not limited to, litigation fees, arbitration fees, preservation fees, public
announcement fees, evaluation fees, appraisal fees, auction fees, travel
expenses, telecommunication expenses and attorney's fees) and all other fees
payable by the Debtor.

                                   ARTICLE III

                                FORM OF GUARANTEE

          3.1 The guarantee provided by Party A shall be a joint and several
liability guarantee. In the event that the Debtor fails to perform its repayment
obligation under the Master Contract, Party B shall have the right to directly
seek indemnification from Party A, and Party A shall immediately satisfy the
credit claim under the Master Contract to Party B.

                                   ARTICLE IV

                                GUARANTEE PERIOD

          4.1 The guarantee period for Party A to bear its liabilities shall be
two (2) years, i.e., two (2) years from the expiration date of the debt
performance period of the Debtor set forth in the Master Contract. The guarantee
period under each business contract (or agreement) shall be calculated
separately.

          4.2 The "expiration date of the debt performance period of the Debtor
set forth in the Master Contract" described above shall include the maturity
date in the case of repayment of debt in installments by the Debtor; and the
debt premature date declared by the Creditor pursuant to the Master Contract.

          4.3 If the business contemplated by the Master Contract is letter of
credit, bank acceptance draft, guarantee or guarantee for delivery of goods, the
guarantee period shall be two (2)

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years from the advance date; if the advance is made in installments, the
guarantee period shall be calculated from each advance date.

                                    ARTICLE V

                        PARTY A'S RIGHTS AND OBLIGATIONS

          5.1 Party A is a legal entity incorporated and validly existing in
accordance with law, has the capacity to act as guarantee and make repayment on
behalf of the debtor as provided in law, and is will to bear and perform the
liabilities under the guarantee to the extent of the assets owned by it or of
which it has the right to dispose.

          5.2 Party A hereby guarantees that the execution of this Contract has
been approved by its superior competent authority or the power organ of the
company, such as the Board of Directors, and it has obtained all necessary
authorization.

          5.3 Party A hereby guarantees that the execution and performance of
this Contract does not violate any stipulations or provisions by which Party A
or any of its assets is bound, any guarantee agreement or other agreement
between Party A and any other party, or any other instrument, agreement or
covenant by which Party A is bound.

          5.4 All documents and materials provided by Party A to Party B shall
be true, accurate, legal and effective.

          5.5 Party A is aware of and consents to all provisions of the Master
contract, and is will to provide the guarantee to the Debtor and guarantees that
it will perform the repayment obligation on behalf of the Debtor pursuant to
this Contract.

          5.6 If the Master Contract covered by this Contract is a Bank
Acceptance Agreement, Party A guarantees that Party A's guarantee liabilities to
Party B hereunder shall not be affected by any dispute relevant or irrelevant to
any notes between the Debtor and the holder, endorser or any other party of the
acceptance draft.

          5.7 In the event that there is any guarantee under the Master Contract
other than the guarantee provided hereunder, Party A's guarantee liabilities to
Party B shall not be affected, or released or reduced, by the guarantee provided
by any other guarantor, nor will Party A's performance of such guarantee
liabilities be subject to any claim made or litigation/arbitration/enforcement
brought by Party B against any other guarantor.

          5.8 Party A hereby guarantees that it will not provide any guarantee
in any other form to any third party beyond its guarantee capacity during the
effective term hereof.

          5.9 Party A hereby guarantees that, during the effective term hereof,
it shall provide its financial statements, including balance sheet and
statements of income and cash flow,

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upon request by Party B, and accept the investigation and supervision of its
operation activities and financial position by Party B.

          5.10 During the effective term hereof, in the event of any change in
its operation model, nature or legal status, such as contractual operation,
lease, custody, asset restructuring, debt restructuring, joint-stock
restructuring, joint operation, merger (or consolidation), split-off, title
transfer of consideration, joint venture (or cooperation), decrease in
registered capital, or petition for winding-up, dissolution (or revocation) or
bankruptcy, Party A shall notify Party B in writing at least thirty (30) days
prior to such change, and bear all liabilities under the guarantee set forth
herein;

          5.11 During the effective term hereof, in the event of any change in
its nature or legal status, such as declaration of winding-up, close-down,
dissolution (revocation) or petition for bankruptcy, or any other circumstance
that would have an adverse effect on its normal operation or deprive it of its
guarantee capacity, Party A shall notify Party B in writing at least three (3)
days prior to such change;

          5.12 Party A shall notify Party B of any change in its address, name
or legal representative within seven (7) days after such change.

                                   ARTICLE VI

                        PARTY B'S RIGHTS AND OBLIGATIONS

          6.1 Party B shall have the right to request, from time to time, Party
A to provide its financial reports, financial statements and other materials
reflecting its operation situation and creditworthiness.

          6.2 In the event that the Debtor fails to make any repayment upon
expiration of the debt performance period set forth in the Master Contract
(including the expiration of each debt due in installments comprising the
principal credit claim or premature date of the debt which has been declared
mature by the Creditor prior to its maturity), Party B shall have the right to
request Party A to bear the joint and several liabilities under the guarantee
pursuant to this Contract.

          6.3 In the event that Party B has any other guarantee over the credit
claim under the Master Contract, Party B shall have the right to first exercise
its rights hereunder, and request Party A to bear its joint and several
liabilities under the guarantee.

          6.4 In the event that Party A fails to bear its liabilities pursuant
to this Contract, Party B shall have the right to directly deduct and collect
any amount payable by Party A from the account opened by Party A with any
business organization of Huaxia Bank. In the event of any such deduction from
Party A's account by Party B, if the currency of such account is different from
that of the principal credit claim, the amount concerned shall be converted
based on the exchange

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rate published by Party B on the date on which such deduction has been made.

          6.5 Party B shall not be required to notify Party A of its execution
of any specific business contract (agreement) with the Debtor.

                                  ARTICLE VII

                              LIABILITY FOR BREACH

          7.1 Upon effectiveness of this Contract, Party A and Party B shall
perform their obligations under this Contract. In the event that any party fails
to perform, in whole or in part, any obligation provided hereunder, such party
shall be liable for the relevant breach and indemnify the other party against
any losses suffered by the other party.

                                  ARTICLE VIII

                            EFFECTIVENESS OF CONTRACT

          8.1 This Contract shall become effective on the date on which the
parties have executed this Contract.

          8.2 The validity of this Contract shall be independent from the
validity of the Master Contract. This Contract shall not be invalid as a result
of the invalidity of the Master Contract. If the Master Contract is held
invalid, Party A shall be liable for any indebtedness incurred in connection
with the return of property or indemnification for damages by the Debtor.

                                   ARTICLE IX

                     AMENDMENT TO AND DISCHARGE OF CONTRACT

          9.1 Upon effectiveness of this Contract, neither Party A nor Party B
shall amend or discharge this Contract without authorization.

          9.2 Party B and the Debtor may amend the Master Contract without the
consent of Party A, except for any renewal thereof or any increase in the amount
of the principal credit claim.

          9.3 In the event that the principal credit claim under this Contract
falls into the category of advance payment by letter of credit, Party A hereby
confirms that, if the applicant of the letter of credit and Party B agree to
amend the letter of credit, and the amount under the

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amended letter of credit (excluding interest, liquidated damages, damages and
other relevant expenses) does not exceed the sum of the amount of the letter of
credit and exceeded amount provided under the relevant Master Contract, such
amendment shall be deemed to have been approved by Party A ( regardless of any
change whatsoever in the amount or any other provision of the letter of credit),
this Contract shall remain valid, and Party A shall continue to bear its several
and joint liabilities under the guarantee.

                                    ARTICLE X

                               DISPUTE RESOLUTION

          10.1 Any dispute arising from the performance of this Contract shall
be settled through consultation. If no settlement can be reached through such
consultation, the parties may choose the following method to solve such dispute:

     to bring an action before the People's Court in the jurisdiction in which
     Party B is located.

     to submit the dispute to _____________ [INFORMATION MISSING IN THE ORIGINAL
     DOCUMENT] arbitration commission for arbitration.

                                   ARTICLE XI

                                  MISCELLANEOUS

          11.1 During the effective term hereof, if Party B has not been
notified in writing of the change in Party A's legal person name, legal
representative or address, all instruments sent to Party A by Party B based on
the information set forth herein shall be deemed to have been sent and given.

          11.2 Other matters as agreed by the parties:

          This guarantee shall not be affected by any amendment, supplement or
change to any loan contract by the borrower and lender, so long as there is no
increase in the amount guaranteed by the guarantor.

          11.3 This Contract shall be prepared in five copies with Party A
holding one (1) copy, Party B holding two (2) copies and the borrower holding
two (2) copies, all of which shall have equal legal validity.

          11.4 The relevant exhibits to this Contract shall be a part of this
Contract, and shall have the same legal validity as this Contract.

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          11.5 Party B has taken reasonable measures to draw the attention of
Party A to the terms hereof with respect to the release or restriction of its
liabilities, and has given a full explanation of the relevant terms at the
request of Party A; and Party A and Party B have no different opinions as to the
understanding of all terms hereof.

Party A: Baoding Tianwei Baobian
         Electric Co., Ltd.             (Seal)

Legal Representative:                   /s/ Jing Chongyou
(or Attorney-in-fact)                   ----------------------------------------
                                        (Signature)

September 6, 2005

Party B Huaxia Bank Co., Ltd.,
        Shijiazhuang Branch

Legal Representative/
Chief Responsible Person:               /s/ Mo Chongfen
(or Attorney-in-fact)                   ----------------------------------------
                                        (Signature or Seal)

September 6, 2005

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