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:
"""
10/19/2017 Rare Element Resources Ltd. EXECUTION COPY IP Rights Agreement 2.20 "Person" has the meaning set forth in the Investment Agreement. 2.21 "Technical Information" means research and development information that is published or unpublished, unpatented inventions, know-how, trade secrets, and technical data in the possession of Company at the Effective Date of this IP Agreement or developed by Company during the term of this IP Agreement that relate to rare earth mineral processing and rare earth separation. 2.22 "Third Party" means a Person other than Investor, the Company or one of their Affiliates. III. License 3.00 Company grants to Investor, for the duration of the Option Period, a worldwide, royalty-free, non-exclusive, irrevocable license (with the right to grant sublicenses to Affiliates) under the Patents to practice the methods therein described and claimed and to make and have made, use, offer to sell, sell and import products made using such methods, and to make Improvements, and to engage in any activity which would give rise to a claim of infringement (direct or indirect or otherwise) of one or more of the Patents in the absence of a license. 3.01 Company further grants to Investor, during the duration of the Option Period, a worldwide, royalty-free, non-exclusive, irrevocable license (with the right to grant sublicenses to Affiliates) to use the Technical Information to practice the methods described and claimed in the Patents and to make and have made, use, offer to sell, sell and import products made using the methods, and to make Improvements, and to engage in any activity which would give rise to a claim of infringement (direct or indirect or otherwise) of one or more of the Patents in the absence of a license. 3.02 If the Option is not exercised prior to the expiration of the Option Period, then Company agrees to extend the license grants set forth in Articles 3.00 and 3.01 beyond the expiration of the Option Period, subject to an annual licensing fee paid by Investor to Company. The non- exclusive rights granted to Investor under this Article 3.02 do not include the right to grant sublicenses to Third Parties. The amount and parameters of the annual licensing fee shall be commercially reasonable, as determined by an independent expert who is mutually agreeable to the Parties and whose determination shall be final and binding; provided, however, that if the Parties cannot agree on the independent expert, each Party shall designate an expert of their choice and the two experts designated by the Parties shall work together in good faith to identify and designate a third, independent expert whose determination shall be binding. Page 3 of 15 Source: RARE ELEMENT RESOURCES LTD, SC 13D, 10/19/2017 Rare Element Resources Ltd. EXECUTION COPY IP Rights Agreement 3.03 If the Option is exercised before the expiration of the Option Period, the license grants set forth in Articles 3.00 and 3.01 will become exclusive to Investor for a perpetual term, shall not be subject to a licensing fee, the granted licenses in favor of the Investor shall be deemed fully paid-up, and the rights granted to Investor under Articles 3.00 and 3.01 shall include the right to grant sublicenses to Third Parties. 3.04 Prior to the earlier of Investor exercising the Option and the expiration of the Option Period, Company will not grant to any Third Party any rights to the Patents or to the Technical Information that extend beyond the expiration of the Option Period. 3.05 The licenses granted in Articles 3.01 to 3.04 of this IP Agreement are subject to a reserved non-exclusive license in the Company to practice the methods described and claimed in the Patents and to make, have made, use, offer to sell, sell and import rare earth products made using such methods, and to use the Technical Information to practice the methods described and claimed in the Patents for such purposes. Such reserved non-exclusive license shall be solely for use by the Company and its Affiliates and shall not be transferable to any Third Party, except in connection with a merger, consolidation, or the sale or transfer of substantially all of the Company's assets associated with the performance of this IP Agreement. 3.06 Investor will not disclose to Third Parties any unpublished Technical Information furnished by Company to Investor during the term of this IP Agreement, or any time thereafter; provided, however, that disclosure may be made of any such Technical Information at any time (i) with the prior written consent of Company, (ii) to
"""

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

assistant: Prior to the earlier of Investor exercising the Option and the expiration of the Option Period, Company will not grant to any Third Party any rights to the Patents or to the Technical Information that extend beyond the expiration of the Option Period.