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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of advertising signs and/or promotional materials covered by this Agreement and to be produced by or on behalf of the HOF Entities at least thirty (30) days before such material is scheduled to be produced. Constellation hereby specifically authorizes the HOF Entities to use such artwork in the production of such advertising signs and/or promotional materials and represents and warrants that all of its advertising copy shall comply with all applicable federal, state and local laws pertinent to the advertising of its products. Constellation represents and warrants that it shall own all intellectual property and related rights or shall otherwise have the right to use and authorize the HOF Entities' use of same as it relates to any such artwork and advertising copy. 4 Source: GPAQ ACQUISITION HOLDINGS, INC., S-4/A, 1/23/2020 (c) Constellation shall be solely responsible for all costs and expenses incurred in connection with the creation and/or production of all advertising signs and/or promotional materials covered by this Agreement unless otherwise specifically noted on Exhibit E, and such costs and expenses shall be borne by Constellation in addition to any amounts due under this Agreement. Constellation shall be invoiced by the HOF Entities for any such materials at the retail cost charged to the HOF Entities (or either of them) by the supplier, without mark-up. Payment with respect to such invoice will be due thirty (30) days following receipt by Constellation of such invoice. Constellation shall be solely responsible for the initial cost of installation of all advertising signs covered by this Agreement, and Constellation shall be responsible for the cost of installation of each advertising sign which is changed as a result of a change in the artwork desired by Constellation during the Term subsequent to its initial installation except in the case of temporary signs planned for eventual replacement with permanent signs. Constellation shall be invoiced by the HOF Entities for any installation costs incurred as a result of such advertising signage change at the retail cost charged to the HOF Entities (or either of them) by the installer, without additional markup. Payment with respect to such invoice will be due thirty (30) days following receipt. The HOF Entities shall be solely responsible for the maintenance of the advertising signs covered by this Agreement during the Term. (d) The HOF Entities have the right to refrain from displaying or illuminating Constellation's advertising panels in Tom Benson Stadium when required to do so by agreements with [***] or any other professional sports league or by television network commitments of the aforementioned leagues. 3.3 Intellectual Property Rights. (a) Reservation of Rights. The HOF Entities and Constellation acknowledge that each Party owns or has rights in certain names, logos, trademarks, service marks, copyrights and other intellectual property (the "Marks"), and owns or has certain merchandising rights in and to its Marks, and all goodwill associated with or symbolized by its Marks. Subject to the license granted hereunder, each Party reserves all right, title and interest in and to its Marks and any merchandising rights in and to such Marks, and all goodwill associated with or symbolized by such Marks. Constellation shall have no right to use the Marks of the HOF Entities (or either of them), the Village or Johnson Controls, Inc. without the prior written consent of the HOF Entities (or the applicable HOF Entity), which shall not be unreasonably withheld, and/or, if applicable, Johnson Controls, Inc. Each Party will be solely responsible for taking such actions as it deems appropriate to obtain and maintain trademark, service mark, or copyright registration for its own Marks and each Party 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
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Extract the exact clause related to "Document Name" from the excerpt above.