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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address at 6350 Stevens Forest Road, Suite #301, Columbia, MD 21046 ("MMT"). SIGA and MMT are sometimes referred to individually as a "Party" and collectively as the "Parties". RECITALS WHEREAS, SIGA developed the FDA-approved oral capsule formulation of TPOXX® (tecovirimat) for the treatment of smallpox; WHEREAS, MMT possesses resources and expertise in the marketing, promoting, advertising, offering for sale and selling of pharmaceutical and antiviral products; and WHEREAS, MMT desires to obtain from SIGA, and SIGA desires to grant to MMT certain exclusive licenses in the Territory to market, promote, advertise, offer for sale and sell the Product in the Field in the Territory, as set forth herein. NOW, THEREFORE, in consideration of the foregoing premises and the mutual promises, covenants and conditions contained in this Agreement, the Parties hereby agree as follows: ARTICLE 1 DEFINITIONS "Active Country" has the meaning set forth in Section 4.4(b). "Affiliate" means, with respect to each Party, any corporation, firm, partnership or other entity or Person which directly or indirectly controls or is controlled by or is under common control with that Party. A Person will be regarded as in "control" (including, with correlative meaning, the terms "controlled by" and "under common control with") of another Person if it (a) owns or controls at least fifty percent (50%) of the equity securities of the subject Person entitled to vote in the election of directors, or (b) possesses, directly or indirectly, the power to direct or cause the direction of the management or policies of any such Person (whether through ownership of securities or other ownership interests, by contract or otherwise). "Alliance Manager" has the meaning set forth in Section 3.1(d). "Anti-Corruption Law" means any applicable Law of any jurisdiction concerning or relating to bribery, kickbacks or corruption including the United States Foreign Corrupt Practices Act of 1977, the Anti-Kickback Statute, the UK Bribery Act 2010, any Laws enacted pursuant to the OECD Convention on Combating Bribery of Foreign Public Officials, and other similar anti-corruption legislation in other jurisdictions, as may be amended from time to time and each to the extent applicable to a Party. Source: SIGA TECHNOLOGIES INC, 8-K, 6/3/2019 "Audit Report" has the meaning set forth in Section 6.5. "Bankruptcy Code" means, as applicable, the U.S. Bankruptcy Code, as amended from time to time, and the rules and regulations and guidelines promulgated thereunder or the bankruptcy laws of any other country or Governmental Authority, as amended from time to time, and the rules and regulations and guidelines promulgated thereunder. "Binding Portion of Forecast" has the meaning set forth in Section 5.1(a). "Business Day" means any day other than a day on which the commercial banks in New York City are authorized or required to be closed. "Business Plan" has the meaning set forth in Section 4.1(a). "Calendar Quarter" means a period of three (3) consecutive months ending on the last day of March, June, September, or December, respectively, except that the first Calendar Quarter of the Term shall commence on the Effective Date and end on June 30, 2019 and the last Calendar Quarter shall end on the last day of the Term. "Calendar Year" means a period of twelve (12) consecutive months beginning on January 1 and ending on December 31, except that the first Calendar Year of the Term shall commence on the Effective Date and end on December 31 of the year in which the Effective Date occurs and the last Calendar Year of the Term shall commence on January 1 of the year in which the Term ends and end on the last day of the Term. "Change of Control" means, with respect to either Party, [***]. "Claims" has the meaning set forth in Section 9.1. "Commercialize" means to Promote, distribute, obtain Pricing Approvals and Reimbursement Approvals, import, export and/or conduct other commercialization activities, and "Commercialization" means commercialization activities related to a product, including any and all activities relating to Promoting, distributing, obtaining Pricing Approvals and Reimbursement Approvals, importing and exporting. "Commercialize" or "Commercialization" shall expressly exclude "Develop" or "Development". "Commercially Reasonable Efforts" means, with respect to the efforts to be expended by any Person with respect to any objective, reasonable, diligent and good faith efforts to accomplish such objective. With respect to the Promotion or other exploitation of the Product, "Commercially Reasonable Efforts" means [***]. "Competing Product" means [***]. "Compliance Communications" has the meaning set forth in Section 8.2(x)(i). 2 Source: SIGA TECHNOLOGIES INC, 8-K, 6/3/2019 "Confidential Information" of a Party means (a) any and all information
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Extract the exact clause related to "Irrevocable Or Perpetual License" from the excerpt above.