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:
"""
Exhibit 10.1 [***] Certain information in this document has been excluded pursuant to Regulation S-K, Item 601(b)(10). Such excluded information is not material and would likely cause competitive harm to the registrant if publicly disclosed. Execution Copy COLLABORATIVE RESEARCH, DEVELOPMENT AND COMMERCIALIZATION AGREEMENT This COLLABORATIVE RESEARCH, DEVELOPMENT AND COMMERCIALIZATION AGREEMENT (this "Agreement") is entered into as of June 8, 2018 (the "Execution Date"), by and between Revolution Medicines, Inc., a corporation organized and existing under the laws of Delaware, having its principal place of business at 700 Saginaw Dr. Redwood City, CA 94063, USA ("RevMed"), and Aventis, Inc., a corporation organized and existing under the laws of Pennsylvania, having offices at 55 Corporate Drive, Bridgewater, NJ 08807 ("Sanofi"). Sanofi and RevMed are referred to in this Agreement individually as a "Party" and collectively as the "Parties." RECITALS WHEREAS, RevMed has developed expertise in cancer biology and related drug discovery and precision medicine capabilities enabling RevMed to design and optimize drug candidates that inhibit the activity of the cancer target known as Src homology region 2-containing protein tyrosine phosphatase 2; WHEREAS, Sanofi is a pharmaceutical company working to develop and commercialize novel therapies; WHEREAS, RevMed and Sanofi desire to establish a collaboration for the research, development and potential commercialization of such drug candidates and biologic compounds that inhibit the activity of such cancer target for the treatment of cancer, and potentially other indications; and WHEREAS, Sanofi desires to acquire from RevMed, and RevMed desires to grant to Sanofi, certain licenses with regard to SHP2 Inhibitors and Products (as defined below), as further described herein. NOW, THEREFORE, in consideration of the foregoing premises and the mutual covenants contained herein, the receipt and sufficiency of which are hereby acknowledged, RevMed and Sanofi hereby agree: Article I. DEFINITIONS The terms in this Agreement with initial letters capitalized shall have the meanings set forth below, or the meaning as designated in the indicated places throughout this Agreement. 1.1 "Accounting Standards" means, with respect to a Party or its Affiliate or Sublicensee, IFRS or GAAP, as such Person uses for its financial reporting obligations, consistently applied. Source: REVOLUTION MEDICINES, INC., S-1, 1/17/2020 1.2 "Acquired Party Family" means in the case of a Change of Control of a Party or its Affiliate, such Party or such Affiliate existing immediately prior to the Change of Control transaction and any subsidiaries thereof (then existing or thereafter created). 1.3 "Acquiror Family" means in the case of a Change of Control of a Party or any of its Affiliates, the Acquiror and its Affiliates existing immediately prior to the closing of the Change of Control transaction together with any future Affiliates other than the Acquired Party Family. 1.4 "Act" means the United States Federal Food, Drug, and Cosmetic Act, as amended, and the rules, regulations, guidance, guidelines and requirements promulgated thereunder (including all additions, supplements, extensions and modifications) in effect from time to time. 1.5 "Affiliate" means, with respect to a Party or other Person, any corporation or other business entity that, directly or indirectly, through one or more intermediaries, controls, is controlled by, or is under common control with that Party or other Person for so long as such Party or other Person controls, is controlled by or is under common control with such corporation or other business entity. For the purpose of this definition only, "control" (including, with correlative meaning, the terms "controlled by" and "under the common control") means the actual power, either directly or indirectly through one or more intermediaries, to direct or cause the direction of the management and policies of such Party or other Person, whether by the ownership of 50% or more of the voting equity of such Party or other Person, by contract or otherwise. Notwithstanding the foregoing, solely with respect to Sections 1.61 (Major Biopharmaceutical Company), and 3.1 (Licenses to Sanofi), "Affiliates" will not include (a) with respect to an entity, its bona fide venture capital or private equity investors, (b) with respect to an entity, its bona fide institutional investors, provided that such institutional investors routinely make venture capital investments for the potential financial return on such investments and for so long as such institutional investors do not (x) obtain any rights (including options, rights to negotiate, rights of first refusal or other contingent rights) to acquire control of such entity or its assets or (y) enter into or agree to enter into any research, development, commercial, license or other strategic transaction with such entity (each investor in clause (a) and
"""

Extract the exact clause related to "Parties" from the excerpt above.

assistant: Sanofi