system: You are a contract-analysis assistant performing a span-extraction task. You are given an excerpt from a commercial contract and the name of a clause type to locate within it.

Return the exact text of the requested clause, copied verbatim from the excerpt — identical wording and punctuation, with no paraphrasing, summarising, explanation, or added commentary.

The excerpt is one window of a much longer contract and often will not contain the requested clause. If the requested clause does not appear in this excerpt, respond with exactly: Not found.

Output only the extracted clause text, or the exact string `Not found.` — nothing else.

user: Contract excerpt:
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under this Agreement; (c) the Software does not contain any materials developed by a third party used by Changepoint except pursuant to a license agreement; and (d) the Software does not, to the best of Changepoint's knowledge and belief, infringe any patent, copyright, trade secret, trademark or other intellectual property rights of a third party. 7.3 PRODUCT WARRANTY. Changepoint warrants that the Software will perform in substantial accordance with the Documentation, and the media on which the Software is distributed will be free from defects in materials and workmanship under normal use, for a period of one hundred twenty (120) days after delivery of the Software to Corio for Acceptance Testing (the "Warranty Period"). In addition, Changepoint warrants that during the Warranty Period the Software is free of any willfully introduced computer virus, or any other similar harmful, malicious or hidden program or data, which is designed to disable, erase, or alter the Software, or any other files, data, or software. If, during the Warranty Period, the Software does not perform in substantial compliance with the Documentation, Changepoint shall take all commercially reasonable efforts to correct the Software, or if correction of the Software is reasonably not possible, at Changepoint's option, replace such Software free of charge. Changepoint will replace any defective media returned to Changepoint during the Warranty Period. In the event any such breach of warranty can not be reasonably corrected at Changepoint's sole expense, Corio has the right to terminate this Agreement and receive a 11 refund of all prepaid fees, if any. The foregoing are Corio's sole and exclusive remedies for breach of the foregoing product warranty. The warranty set forth above is made to and for the benefit of Corio only. This product warranty shall not apply if: (a) the Software has been not properly installed and used at all times and in accordance with the Documentation; and (b) Corio has requested modifications, alterations or additions to the Software that cause it to deviate from the Documentation. 7.4 PRODUCT WARRANTY - YEAR 2000 COMPLIANCE. Changepoint warrants that the Software, when used in accordance with the Documentation, is in all material respects capable upon installation of accurately processing, providing and/or receiving date data from, into and between the twentieth and twenty-first centuries, including the years 1999 and 2000, and leap year calculations; provided that all licensee and third party equipment, systems, hardware, software and firmware used in combination with the Software properly exchange date data with the Software and accurately process, provide and/or receive date data from, into and between the twentieth and twenty-first centuries, including the years 1999 and 2000, and leap year calculations. Changepoint's sole liability under this Section 7.4 is limited to use of reasonable efforts to correct or replace the defective Software with conforming Software, and if neither of the foregoing are commercially practicable, as determined by Changepoint in its reasonable discretion, Changepoint may, at its option, terminate this Agreement and refund all prepaid fees, if any. The foregoing are Corio's sole and exclusive remedies for breach of this Year 2000 warranty and Changepoint's sole obligation. 7.5 CORIO WARRANTIES. Corio represents and warrants that (i) it has the right and power to enter into and fully perform this Agreement, (ii) in entering into this Agreement, Corio is not, to the best of its knowledge and belief, in breach of any contractual&sbsp;or other obligation to any third party, (iii) it will comply with the terms of its agreements with its Customers who purchase the right to use the Software in connection with the Corio Services; (iv) it shall not make any representations about the Software to third parties, including Customers, which it is not authorized by Changepoint in writing to make, or which are not set forth in the Documentation or other written sales, marketing and training materials provided by Changepoint intended for distribution to customers, and (v) it shall not make any representations and warranties on behalf of Changepoint unless expressly authorized by Changepoint in writing. 7.6 DISCLAIMER. Except as expressly provided herein, CHANGEPOINT LICENSES THE SOFTWARE TO CORIO ON AN "AS IS" BASIS. NEITHER PARTY MAKES ANY OTHER WARRANTY OF ANY KIND, WHETHER EXPRESS, IMPLIED, STATUTORY OR OTHERWISE, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY, MERCHANTABLE QUALITY, NONINFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE. 8 INDEMNIFICATION. 8.1 BY CHANGEPOINT. Changepoint shall indemnify, defend and hold harmless Corio and its Customers from any and all damages, liabilities, costs and expenses (including reasonable attorneys' fees) awarded by a court against
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Extract the exact clause related to "Warranty Duration" from the excerpt above.

assistant: Changepoint will replace any defective media returned to Changepoint during the Warranty Period.