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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its trademark protection program and will be a "work made for hire" for NFLA. All of Company's uses of the Licensed Marks shall inure to the benefit of the NFLA. After the expiration or termination of this Agreement, Company will refrain from further use of the Licensed Marks used pursuant to this Agreement. Company will not sublicense pass-through or otherwise grant to any third parties the rights granted to Company hereunder without the NFLA prior written consent, including but not limited to the right to use the Licensed Marks. Company acknowledges that this Agreement does not grant Company any rights with respect to any other NFLA Marks (defined below), the name, likeness, signature, or other attributes of any NFLA member or other individual, or any audio or video of any NFLA event. Company agrees that the quality of all services offered by Company under the Licensed Marks will conform to Licensor's written quality control standards and that Company will annually provide to NFLA samples of any advertising and marketing materials that use the Licensed Marks. I. "Trademark Protection" for the purposes of this agreement, "NFLA MARKS" means the names, symbols, emblems, designs, and colors of the NFLA, including but not limited to the Licensed Marks. Company acknowledges and agrees that all right, title and interest in and to the NFLA marks belongs to the NFLA. Company agrees that NFLA marks possesses a special, unique and extraordinary character that makes difficult assessment of the monetary damages that would be sustained by their unauthorized use. Company recognizes that irreparable injury would be caused by unauthorized use of any of the NFLA marks, and agrees that injunctive and other equitable relief would be appropriate in the event of such unauthorized use, and that such remedy would not be exclusive of other legal remedies available to NFLA. Company recognizes that great value and goodwill associated with NFLA marks belongs to the NFLA and that the NFLA marks have secondary meaning. 2 Source: GRIDIRON BIONUTRIENTS, INC., 8-K, 12/6/2017 J. "NFLA Identification" means the right to use, subject to the provisions of this Agreement, the NFLA name, and Pro Football Legends Logo and any other means of endorsement by the NFLA used in connection with the advertisement and promotion of the Company and the Licensed Products. K. "One (1) Unit" shall represent $0.05 (1 Unit = $0.05USD) for purposes of defining the monetary donation allocation of the Company's sold products to the NFLA-NC, specific to the terms of this Agreement. A Licensed Product in no circumstance shall be valued at less than one (1) full Unit and under no circumstance shall a Unit be fractionalized (if required rounded up to the nearest whole number). SECTION TWO. GRANT OF RIGHTS In consideration of the remuneration to be paid to the NFLA-NC pursuant to this Agreement, the NFLA grants to Company and to its authorized distributors and sublicenses the right and license during the Contract Period to use the NFLA Identification solely in connection with the advertisement, marketing and promotion of the Products within the Contract Territory as set forth in this Agreement. NFLA agrees not to grant the right to use the NFLAs Identification to anyone other than Company in connection with the advertisement and promotion of Products. It is understood that Company, its authorized distributors and sublicenses may not use the name of the NFLA in connection with any items for sale or resale, other than the Products as specified in this Agreement. The foregoing rights to use the name of the NFLA is limited to television, radio and print advertising, advertising published over the Internet (provided that such material is limited to advertising or Product promotion only), public relations and marketing materials, point-of-sale displays, free standing inserts, videos shown to customers and consumers, catalogs for customers and consumers, direct mail (including e-mail) and billboards. Company shall ensure that all uses of the name of the NFLA comply with applicable law. SECTION THREE. PRIOR APPROVAL Company agrees that no use of the name of the NFLA Identification nor any item used in connection with the name of NFLA Identification (including any Licensed Product) will be made under this Agreement unless and until the same is approved by the NFLA. The NFLA agrees that any material, advertising or otherwise, submitted for approval as provided in this section may be deemed by Company to have been approved under this section if the same is not disapproved in writing within ten (10) business days after receipt of the material.
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Extract the exact clause related to "Covenant Not To Sue" from the excerpt above.