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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Mark are owned by Licensor and used by Licensee under license from Licensor. 1.4 Licensee Cooperation. Licensee agrees to reasonably cooperate with Licensor in achieving registration of the Licensed Mark worldwide, and in maintaining and protecting existing registrations therefor at Licensor's sole expense. Licensee shall execute any and all documents which Licensor may reasonably request in support of such registrations, and, at Licensor's request, Licensee shall provide use evidence, testimony, and documentation that may be required in any ex parte or inter partes administrative proceedings and prosecutions, maintenance and renewals involving registrations of the Licensed Mark, at Licensee's sole expense. 1.5 Quality Control, Licensor Approvals. Licensor, as owner of the Licensed Mark, shall have the right at all times to control and approve the nature and quality of the Licensed Products (and the Licensed Mark thereon), and to inspect Licensee's business operations upon reasonable prior notice for the purpose of ensuring that a high level of quality of the Licensed Products is being maintained by Licensee. At Licensor's reasonable request during each calendar year, Licensee shall submit samples to Licensor, at no cost to Licensor, and shall not materially depart therefrom without Licensor's prior express written consent. The Licensed Products, as well as all promotional, packaging and advertising material relative thereto, shall include all appropriate legal notices as required by Licensor. No more frequently than once per year, a third party auditor chosen by Licensor and approved by Licensee, such approval not to be unreasonably withheld, shall be entitled at any time on reasonable notice to the Licensee to enter, during regular business hours, any premises used by the Licensee or its manufacturers for the manufacture, packaging or storage of the Licensed Products, to inspect such premises, all plant, workforce and machinery used for manufacture, packaging or storage of Licensed Products and all other aspects of the manufacture, packaging and storage of Licensed Products ("Access Rights"). Prior to exercising such Access Rights, the third party auditor shall enter into a nondisclosure agreement with Licensee that, among other terms deemed acceptable by Licensee and such third party auditor, shall: (a) limit the content of any report made by the third party auditor to Licensor to a description of the manner in which, and the conditions under which, the Licensed Mark are used by Licensee or its manufacturers; and (b) prevent the disclosure of any of Licensee's trade secrets and/or Confidential Information. To the extent reasonably practicable, all Licensed Products shall include notices on labeling and packaging for the Licensed Products stating that the Licensed Mark is owned by Licensor and used by Licensee under license from Licensor. The Licensed Products shall be of a quality commensurate with previous production or the samples approved by Licensor. If the quality of a class of the Licensed Products falls below such standards, Licensee shall use commercially reasonable efforts to restore such quality. In the event that Licensee has not taken appropriate steps to restore such quality within one-hundred twenty (120) days after notification by Licensor, Licensor shall have the right to terminate this Agreement. 2 Source: ARCONIC ROLLED PRODUCTS CORP, 10-12B, 12/17/2019 1.6 Compliance with Trademark Usage Guidelines. Licensee agrees to comply with Licensor's trademark usage guidelines and any other policies and requirements applicable to the Licensed Mark. 2. ENFORCEMENT OF INTELLECTUAL PROPERTY. If legally able and without breaching any confidentiality provisions of a contract with a third party, in the event that Licensee becomes aware that any third party is infringing the Licensed Mark, Licensee shall promptly notify Licensor and provide pertinent details. Licensor shall have the right in its sole discretion to bring a legal action for infringement against the third party, together with the right to enforce and collect any judgment thereon. If Licensor elects to exercise such right, Licensee shall, at Licensor's request, provide reasonable assistance to Licensor, at the sole expense of Licensor. 3. INDEMNIFICATION. Licensee shall defend, indemnify and hold harmless Licensor and its officers, directors, employees, agents, corporate subsidiaries, parents, and affiliates ("Licensor Indemnitees") from and against any and all demands, claims, actions or causes of action, assessments, deficiencies, damages, losses, liabilities and expenses (including, without limitation, reasonable expenses of investigation and attorneys' fees and expenses), incurred in conjunction with or arising out of or relating to any third-party claim concerning the Licensed Products and any acts or omissions of Licensee with respect to the Licensed Mark, including without limitation Licensee's performance of its obligations under this Agreement. The Licensor Indemnitees agree to cooperate with Licensee, at
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Extract the exact clause related to "Most Favored Nation" from the excerpt above.