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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at the expense of KI, Inc., for the purpose of securing and preserving KI, Inc.'s (or any grantor of KI, Inc.'s) rights in and to KI's name. It is agreed that nothing contained in this Agreement shall be construed as an assignment or grant to Diplomat of any right, title or interest in or to KI's name, it being understood that all rights relating thereto are reserved by KI, Inc., except for the license hereunder to Diplomat of the right to use and utilize KI's name only as specifically and expressly provided in this Agreement. Diplomat hereby agrees that at the termination or expiration of this Agreement Diplomat will be deemed to have assigned, transferred and conveyed to KI, Inc. any trade rights, equities, good will, titles or other rights in and to KI's name which may have been obtained by Diplomat or which may have vested in Diplomat in pursuance of any endeavors covered by this Agreement, and that Diplomat will execute any instruments requested by KI, Inc. to accomplish or confirm the foregoing. Any such assignment, transfer, or conveyance shall be without consideration other than the mutual covenants and considerations of this Agreement. (c) Diplomat hereby agrees that its every use of KI's name shall inure to the benefit of KI, Inc. and that Diplomat shall not at any time acquire any rights in KI's name by virtue of any use it may make of such name. 11. Promotional Material. (a) In all cases where Diplomat desires artwork to be created involving products that are the subject of this license, the cost of such artwork and the time for the production thereof shall be borne by Diplomat. All artwork and designs involving KI's name, or any reproduction thereof, shall, notwithstanding their invention or use by Diplomat, be and remain the 7 property of SW, and SW shall be entitled to use the same and to license the use of the same by others. (b) KI, Inc. shall have the right, but shall not be under any obligation, to use KI's name and/or the name of Diplomat so as to give KI's name, KI, Inc., or KI, Inc.'s programs full and favorable prominence and publicity. KI, Inc. shall not be under any obligation whatsoever to use KI's name, or any person, character, symbol, design, likeness, or visual representation thereof in any radio or television program. (c) Diplomat agrees not to offer for sale, advertise, or publicize any of the products licensed hereunder on radio or television without the prior written approval of KI, Inc., which approval KI, Inc. may grant or withhold in its unfettered discretion. 12. Distribution. (a) Diplomat agrees that during the term of this license it will diligently and continuously manufacture, distribute and sell the products covered by this Agreement and that it will make and maintain adequate arrangements for the distribution of the products. (b) Diplomat agrees that it will sell and distribute the products covered by this Agreement (i) to jobbers, wholesalers and distributors for sale and distribution to retail stores and merchants, and (ii) to retail stores and merchants for sale and distribution direct to the public. Diplomat shall not, without the prior written consent of KI, Inc., sell or distribute such products to jobbers, wholesalers, distributors, retail stores, or merchants whose sales or distribution are or will be made for publicity or promotional tie-in purposes, combination sales, premiums, give-aways, or similar methods of merchandising. In the event any sale is made at a special price to any of Diplomat's subsidiaries or to any other person, firm or corporation related in any manner to Diplomat or its officers, directors or major stockholders, there shall be a royalty paid on such sales based upon the price generally charged the trade by Diplomat. (c) Diplomat agrees to sell to KI, Inc. such quantities of the products at as low a rate and on as good terms as Diplomat sells similar quantities of the products to the general trade. 13. Records. Diplomat agrees to keep accurate books of account and records covering all transactions relating to the license hereby granted. KI, Inc. and its duly-authorized representatives shall have the right, upon reasonable notice and at reasonable hours of the day, to visit the offices of Diplomat one time each calendar quarter for the purpose of examining said books of account and records, and all other documents and materials in the possession or under the control of Diplomat, with respect to the 8 subject matter and terms
"""

Extract the exact clause related to "Warranty Duration" from the excerpt above.