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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standards for publication, CytoDyn shall publish such results on the clinicaltrials.gov website and CytoDyn shall provide Vyera with notification of any such publications. Should Vyera propose to make any publication relating to the Licensed Product, CytoDyn shall have the right to review all proposed publications prior to submission of such publication. Vyera shall provide CytoDyn with a copy of the applicable proposed abstract, manuscript, or presentation no less than thirty (30) days (fifteen (15) days in the case of abstracts) prior to its intended submission for publication. CytoDyn shall respond in writing promptly and in no event later than thirty (30) days (fifteen (15) days in the case of abstracts) after receipt of the proposed material with any concerns regarding patentability or protection of any Confidential Information or other comments that it may have. In the event of concern over patent protection of any intellectual property right, Vyera agrees not to submit such publication or to make such presentation that contains such information until CytoDyn is given a reasonable period of time, and in no event more than sixty (60) days, to seek patent protection in accordance with the terms of this Agreement, for any material in such publication or presentation which it believes is patentable. Subject to Section 10.3, any Confidential Information shall, if requested by CytoDyn, be removed by Vyera. Vyera will reasonably consider other comments made by CytoDyn. ARTICLE 11 TERM AND TERMINATION 11.1 Term. The term of this Agreement ("Term") shall commence upon the Effective Date and, unless earlier terminated pursuant to this Article 11, shall expire on the last day of the Royalty Term. Upon the expiration of the Royalty Term, the license granted to Vyera under Section 2.1 of this Agreement shall become non-exclusive, fully-paid, royalty free, perpetual and irrevocable. Notwithstanding the foregoing, if Vyera exercises the Continuation Right (as defined in the Supply Agreement), then Vyera shall continue to purchase Licensed Product from CytoDyn pursuant to the Supply Agreement and shall pay CytoDyn for such Licensed Product the price specified in the Supply Agreement and a royalty equal to [***], provided that after the exercise of the Continuation Right, CytoDyn will not be obligated to supply Licensed Product exclusively to Vyera in the Field in the Territory. 11.2 Unilateral Termination by Vyera. Vyera shall have the right to terminate this Agreement in its entirety: (a) on or after the second (2nd) anniversary of the Effective Date, upon written notice to CytoDyn in the event the approval by the FDA of the BLA for the Licensed Product for the Manufacture and sale of the Licensed Product in the U.S. for the Initial Indication has not been received by such second (2nd) anniversary; provided, however, that in the event of a delay that would reasonably be expected to result in the receipt of BLA approval on or after such second (2nd) anniversary, then Vyera may terminate this Agreement pursuant to this Section 11.2(a) prior to the second (2nd) anniversary upon [***] notice to CytoDyn; Source: CYTODYN INC., 10-Q, 1/9/2020 (b) following the occurrence of a Commercial Failure, upon [***] written notice to CytoDyn; provided, however, that Vyera's right to terminate this Agreement pursuant to this Section 11.2(b) shall only be exercisable during the [***] period following the date when sales data with respect to a Commercial Failure becomes available to Vyera; and (c) at any time following the second (2nd) anniversary of the First Commercial Sale of the Licensed Product, for any reason or no reason, upon one hundred eighty (180) days' written notice to CytoDyn. 11.3 Unilateral Termination by CytoDyn. CytoDyn shall have the right to terminate this Agreement in its entirety upon written notice to Vyera on the occurrence of any of the following: (a) Vyera or any of its Affiliates directly or indirectly, challenges, disputes, or assists any Third Party to dispute or challenge, in a legal or administrative proceeding the patentability, enforceability or validity of any CytoDyn Patents; (b) Vyera fails to make a First Commercial Sale within sixty (60) days following the later of (i) the date Regulatory Approval is obtained and (ii) the date CytoDyn supplies (or is ready to supply) Vyera with the Licensed Product for sale pursuant to the Supply Agreement (the "Supply Date"); (c) Vyera breaches its obligations or covenants under Section 2.6 (Competitive Products); (d) Upon [***] written notice, in the event Vyera fails to meet any of the Minimum Requirements and has not cured such failure, to the extent curable, within such notice period;
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Extract the exact clause related to "Covenant Not To Sue" from the excerpt above.

assistant: CytoDyn shall have the right to terminate this Agreement in its entirety upon written notice to Vyera on the occurrence of any of the following: (a) Vyera or any of its Affiliates directly or indirectly, challenges, disputes, or assists any Third Party to dispute or challenge, in a legal or administrative proceeding the patentability, enforceability or validity of any CytoDyn Patents;