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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will have the exclusive right to enforce its own Marks, including the right to assert, defend or settle any allegations or claims of infringement, dilution, misappropriation or similar violation of same. (b) Grant of Rights by HOF Entities. The HOF Entities grant to Constellation a nonexclusive, nontransferable, royalty-free license to use the marks set forth on Exhibit F ("HOF Entity Marks") in the United States or online during the Term solely in connection with (i) Constellation's use and promotion of the designations set forth on Exhibit E in connection with commercial activations, marketing promotions, commercial programs and marketing programs related to the Village, (ii) B2B-related and B2C-related marketing activities approved by the HOF Entities and (iii) as otherwise expressly contemplated by this Agreement. This license expressly prohibits any pass-through rights or the use of the HOF Entity Marks by any third party, except (x) to Constellation's subsidiaries and brands for use in a manner consistent with clauses (i) through (iii) hereof or (y) with the express written consent of the HOF Entities (or the appropriate HOF Entity). On termination or expiration of this Agreement, Constellation shall cease all use of the HOF Entity Marks as soon as practicable, but in any event within thirty (30) days unless the particular media which has been approved requires a longer lead time, but in no event longer than ninety (90) days. 5 Source: GPAQ ACQUISITION HOLDINGS, INC., S-4/A, 1/23/2020 (c) Quality Control - Marks. (i) Each licensee Party agrees, in connection with its use of any of the licensor Party's Marks, to comply with any quality-control standards as such licensor Party may provide hereunder from time to time and which may be revised by the Party owning the Marks from time to time. Each Party shall take such actions as the Party owning the Marks may reasonably request to ensure compliance with such quality-control standards in connection with the licensee Party's use of any of the Marks. (ii) Each licensee Party shall comply with all applicable laws and regulations and shall obtain all necessary licenses, permits, and governmental approvals, in connection with the manufacture, promotion, advertising, distribution, and sale of any products and/or services utilizing any of the licensor Party's Marks. (iii) A licensee Party shall not change in any way or in any manner the licensor Party's Marks in any use on any products or any advertisements or other marketing materials therefor, unless any such proposed change is first approved in writing by the Party owning the Mark(s) in question. Any changes made by a licensee Party to the licensor Party's Marks will be owned by the applicable Party owning the underlying Marks (which ownership will be confirmed or otherwise documented by the licensee Party in writing, at the request of the Party owning the Marks) and, where approved by the Party owning the Marks pursuant to this subsection (iii), made automatically subject to the terms of this Agreement. (iv) Each licensee Party acknowledges, understands, and agrees that it shall not perform, do, or cause any act to be done, or fail to take any action, during or after the Term, or assist any third party in performing, doing, and/or causing any act to be done, which would in any way or manner be detrimental to, injure or impair, in any way or to any degree: (A) the licensor Party's Marks (or any of them); (B) any applications for registration and/or registrations therefor; (C) the goodwill related to the licensor Party's Marks (or any of them); (D) a licensor Party's federal, state and/or common law and other rights in or to the licensor Party's Marks; (E) a licensor Party's right, title, interest, and ownership in and to the licensor Party's Marks; and/or (F) the validity or enforceability of the any of the foregoing. (d) Grant of Rights by Constellation. Constellation grants to the HOF Entities a nonexclusive, nontransferable, royalty-free license to use the marks set forth on Exhibit G ("Constellation's Marks") in the United States or online throughout the Term solely in connection with the Sponsorship Rights, the advertising and promotion of the Village, including any musical, athletic or other live performance events at the Village, in connection with the name of the Center for Excellence and/or any Co-Branded Center for Excellence Logos and otherwise as expressly contemplated by this Agreement. The HOF Entities shall identify Constellation as a sponsor of the Village and shall have the right to use Constellation's Marks in connection with television, radio and print advertising of the
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Extract the exact clause related to "Exclusivity" from the excerpt above.