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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Such reasonable precautions shall include exercising precautionary measures designed to preserve the secrecy of such information and to prevent its disclosure to third parties, except following prior consent of the other party, with such precautions being at least equivalent to those taken by each party with respect to its own confidential information. 10. PATENTS AND COPYRIGHT MMI warrants that the Services supplied to Dragon Systems will not infringe any third parties' intellectual property rights. MMI will defend and indemnity Dragon Systems against a claim that the Services supplied hereunder infringe a patent or copyright and will pay resulting costs and damages provided that Dragon Systems (i) promptly informs MMI in writing of the claim and (ii) gives MMI sole control of the defense and all related settlement negotiations. MMI will either procure the right for Dragon Systems to continue using the Services or replace or modify them so that they become non-infringing or accept return of the Services for a credit equal to the price paid by Dragon Systems. 11. COPYRIGHT AND COPYRIGHT LICENSE Dragon Systems hereby grants MMI the rights to copy in printed or electronic form the master materials according to the forecasted numbers given to MMI by Dragon Systems. 12. TERM AND TERMINATION This Agreement shall be valid for an indefinite period. Both parties may terminate the Agreement with immediate effect - - of either party breaches a material term of the Agreement - - in case of a merger or change of key management or control - - in case of bankruptcy or similar. Dragon may terminate this agreement without cause by giving sixty (60) days written notice to MMI. -3- 4 13. GOVERNING LAW Any lawsuit relating to any matter arising under this Agreement may be initiated in a State or Federal Court located in the Commonwealth of Massachusetts or in any court in the Netherlands having jurisdiction over the matter. 14. INSURANCE MMI shall at its own expense obtain and maintain with an insurer adequate insurance coverage in respect of any Dragon Systems property under the care, custody or control of MMI. MMI shall immediately notify Dragon Systems in writing of any theft, loss or damage to any Dragon Systems property and shall indemnify Dragon Systems in respect of the same. MMI \s\ John Dick General Manager - ------------------------------------------------------- 19 Jan. 1998 DRAGON SYSTEMS, INC. \s\ Janet M. Baker, President - ----------------------------------------------------- 12 Jan. 1998 -4- 5 NaturallySpeaking Part Number Description 1,000 units 2,500 units 5,000 units 10,000 units 25,000 units 50,000 units - ---------------------- ------------------- ------------- ------------ ------------ ------------- ------------ ------------- [**] -5- 6 Dictate Power Part Number Description 1,000 units 2,500 units 5,000 units 10,000 units 25,000 units 50,000 units - ---------------------- ------------------- ------------- ------------ ------------ ------------- ------------ ------------- [**] -6- 7 Dictate Classic Part Number Description 1,000 units 2,500 units 5,000 units 10,000 units 25,000 units 50,000 units - ---------------------- ------------------- ------------- ------------ ------------ ------------- ------------ ------------- [**] -7-
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Extract the exact clause related to "Expiration Date" from the excerpt above.

assistant: This Agreement shall be valid for an indefinite period.