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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for contribution or indemnity against any Constellation Indemnified Person with respect to, any and all Indemnified Losses resulting from or arising out of (i) the use or display by Constellation of HOF Entity Marks as permitted by this Agreement or (ii) any breach by such HOF Entity of its representations, warranties and/or obligations under this Agreement. (c) Notice of Claim. In the event that an HOF Entity seeks indemnification on behalf of an HOF Entity Indemnified Person, or Constellation seeks indemnification on behalf of a Constellation Indemnified Person, such Party seeking indemnification (the "Indemnified Party") shall give reasonably prompt notice to the indemnifying Party (the "Indemnifying Party") specifying the facts constituting the basis for such claim and the amount, to the extent known, of the claim asserted; provided, however, that the right of a person or entity to be indemnified hereunder shall not be adversely affected by a failure to give such notice unless, and then only to the extent that, any Indemnifying Party is actually irrevocably and materially prejudiced thereby. Subject to the terms hereof, the Indemnifying Party shall pay the amount of any valid claim not more than ten (10) days after the Indemnified Party provides notice to the Indemnifying Party of such amount. 11 Source: GPAQ ACQUISITION HOLDINGS, INC., S-4/A, 1/23/2020 (d) Right to Contest Claims of Third Persons. If an Indemnified Party is entitled to indemnification hereunder because of a claim asserted by any claimant (other than a Constellation Indemnified Person or HOF Entity Indemnified Person) (a "Third Person"), the Indemnified Party shall give the Indemnifying Party reasonably prompt notice thereof after such assertion is actually known to the Indemnified Party; provided, however, that the right of a person or entity to be indemnified hereunder in respect of claims made by a Third Person shall not be adversely affected by a failure to give such notice unless, and then only to the extent that, an Indemnifying Party is actually irrevocably and materially prejudiced thereby. The Indemnifying Party shall have the right, upon written notice to the Indemnified Party, and using counsel reasonably satisfactory to the Indemnified Party, to investigate, contest or settle the claim alleged by such Third Person (a "Third Person Claim"), provided that the Indemnifying Party has unconditionally acknowledged to the Indemnified Party in writing its obligation to indemnify the persons and entities to be indemnified hereunder with respect to such Third Person Claim and to discharge (and does in fact so discharge) any cost or expense arising out of such investigation, contest or settlement. The Indemnified Party may thereafter participate in (but not control) the defense of any such Third Person Claim with its own counsel at its own expense, unless separate representation is necessary to avoid a conflict of interest, in which case such representation shall be at the expense of the Indemnifying Party. Unless and until the Indemnifying Party so acknowledges its obligation to indemnify, the Indemnified Party shall have the right, at its option, to assume and control defense of the matter and to look to the Indemnifying Party for the full amount of the reasonable costs of defense. The failure of the Indemnifying Party to respond in writing to the aforesaid notice of the Indemnified Party with respect to such Third Person Claim within thirty (30) days after receipt thereof shall be deemed an irrevocable election not to defend the same. If the Indemnifying Party does not so acknowledge its obligation to indemnify and assume the defense of any such Third Person Claim, (i) the Indemnified Party may defend against such claim using counsel of its choice, in such manner as it may reasonably deem appropriate, including, but not limited to, settling such claim, after giving notice of the same to the Indemnifying Party, on such terms as the Indemnified Party may reasonably deem appropriate, and (ii) the Indemnifying Party may participate in (but not control) the defense of such action, with its own counsel at its own expense. If the Indemnifying Party thereafter seeks to question the manner in which the Indemnified Party defended such Third Person Claim or the amount or nature of any such settlement, the Indemnifying Party shall have the burden to prove by clear and convincing evidence that conduct of the Indemnified Party in the defense and/or settlement of such Third Person Claim constituted gross negligence or willful misconduct. The Parties shall make available to each other all relevant information in their possession relating to any such Third Person Claim and shall cooperate in
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Extract the exact clause related to "Document Name" from the excerpt above.