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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"Indemnifying Party" 11.3.1 "Infringement Claim" 9.4.1 "Joint Collaboration Patents" 9.1.1 "Aimmune" Preamble "Aimmune Collaboration Patents" 9.1.1 "Xencor" Preamble "Xencor Collaboration Patents" 9.1.1 "Losses" 11.1 "Packaging and Labeling" 6.2 Term Section "Party" or "Parties" Preamble "Product Trade Dress" 5.4.1 "Product Trademark" 5.4.1 "Recovery" 9.4.2(c)(iv) "Shares" 7.1 "Stock Issuance Agreement" 7.1 "Sublicensee" 2.3.2 "Term" 13.1 "Third Party Patent" 7.3.2(b) "Upfront Payment" 7.1 "VAT" 8.3.3 Source: AIMMUNE THERAPEUTICS, INC., 8-K, 2/5/2020 2.2.2 No Implied Licenses; Retained Rights. Except as explicitly set forth in this Agreement, Xencor does not grant any license, express or implied, under its intellectual property rights to Aimmune, whether by implication, estoppel or otherwise. 2.2.3 Upstream Agreement. Aimmune acknowledges, understands and agrees that (i) the Xencor Know-How licensed to Aimmune pursuant to Section 2.1 includes certain Know-How licensed to Xencor pursuant to the Upstream Agreement, (ii) the license to such Xencor Know-How constitutes a sublicense under the Upstream Agreement, (iii) Aimmune's rights to such Xencor Know-How are subject and subordinate to the terms and conditions of the Upstream Agreement, (iv) Aimmune will comply with the Upstream Agreement, including undertaking such activities as Xencor reasonably requests to so comply, (v) [***] is responsible for any and all payments due under the Upstream Agreement (following the Effective Date) in connection with Developing, Manufacturing and Commercializing the Product by or on behalf of Aimmune (including by or on behalf of its Affiliates or sublicensees), and (vi) Aimmune received a copy of the Upstream Agreement prior to the Effective Date. 2.3 Performance by Affiliates and Sublicensees. 2.3.1 Performance by Affiliates. The Parties recognize that each may perform some or all of its obligations under this Agreement through Affiliates; provided, however, that each Party shall remain responsible for and be guarantor of the performance by its Affiliates and shall cause its Affiliates to comply with the provisions of this Agreement in connection with such performance. Each Party hereby expressly waives any requirement that the other Party exhausts any right, power or remedy, or proceed against an Affiliate, for any obligation or performance hereunder prior to proceeding directly against such Party. Wherever in this Agreement the Parties delegate responsibility to Affiliates, the Parties agree that such entities may not make decisions inconsistent with this Agreement, amend the terms of this Agreement or act contrary to its terms in any way. 2.3.2 Sublicensees. Aimmune shall [***] the right (but not the obligation) to sublicense the rights granted to it under Section 2.1 to its Affiliates or Third Parties (each, a "Sublicensee"); provided, however, that Aimmune shall remain responsible for the performance by any of its direct and indirect Sublicensees and shall cause its direct and indirect Sublicensees to comply with the applicable provisions of this Agreement in connection with such performance. Without limiting the foregoing, Aimmune shall cause its direct and indirect Sublicensees to accept in writing all applicable terms and conditions of this Agreement, including the reporting, audit, inspection and confidentiality provisions hereunder and Sections 2.2.1 and 2.4. For the avoidance of doubt, (a) Aimmune will remain directly responsible for all amounts owed to Xencor under this Agreement, and (b) Aimmune shall cause each Sublicensee (including each tier of Sublicensee) to be subject to the negative and restrictive covenants set forth in Sections 2.2.1 and 2.4, respectively. Aimmune hereby expressly waives any requirement that Xencor exhaust any right, power or remedy, or proceed against a subcontractor, for any obligation or performance hereunder prior to proceeding directly against Aimmune. 2.4 Restrictive Covenants. Aimmune hereby covenants and agrees that it shall not (and shall cause the other Aimmune Agreement Entities not to), either directly or indirectly, 14 Source: AIMMUNE THERAPEUTICS, INC., 8-K, 2/5/2020 Develop, Manufacture, or Commercialize the Product for use outside the Licensed Field. Furthermore, Xencor hereby covenants and agrees that it shall not (and shall cause its Affiliates not to), either directly or through granting a license or other right to, or otherwise facilitating, a Third Party to (a) Develop, Manufacture or Commercialize the Antibody or the Product during the Term, (b) commence any [***] of any [***] that is not the Antibody or a Product and that [***] for use in the Licensed Field, prior to the [***] ([***]t h) anniversary of the Effective Date, or (c) Develop, Manufacture or Commercialize any [***] that is not the Antibody or a Product and that [***] for use in the Aimmune Field during the Term. It is the desire and intent of the Parties that the restrictive covenants contained in this Section 2.4 be enforced to the
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Extract the exact clause related to "Affiliate License-Licensee" from the excerpt above.

assistant: Aimmune shall [***] the right (but not the obligation) to sublicense the rights granted to it under Section 2.1 to its Affiliates or Third Parties (each, a "Sublicensee"); provided, however, that Aimmune shall remain responsible for the performance by any of its direct and indirect Sublicensees and shall cause its direct and indirect Sublicensees to comply with the applicable provisions of this Agreement in connection with such performance.