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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agrees not to, and shall not permit any member of the SpinCo Group to, oppose, petition to cancel, or otherwise challenge or object to the use of or any current application and/or subsequent application for registration by RemainCo or any member of the RemainCo Group of any RemainCo House Marks as long as such use and/or registration does not make use of the SpinCo House Marks and further agrees to take such actions as may be reasonably requested by RemainCo and execute or cause to be executed by the appropriate members of the SpinCo Group such other agreements, instruments and other documents, including coexistence agreements and letters of consent, as may be reasonably requested by RemainCo to facilitate the registration and continued prosecution of RemainCo House Marks (e.g., in the event that any SpinCo House Mark is cited against an application for a RemainCo House Mark). (b) RemainCo agrees not to, and shall not permit any member of the RemainCo Group to, oppose, petition to cancel, or otherwise challenge or object to the use of or any current application and/or subsequent application for registration by SpinCo or any member of the SpinCo Group of any SpinCo House Marks, as long as such use and/or registration does not make use of the RemainCo House Marks and further agrees to take such actions as may be reasonably requested by SpinCo and execute or cause to be executed by the appropriate members of the RemainCo Group such other agreements, instruments and other documents, including coexistence agreements and letters of consent, as may be reasonably requested by SpinCo to facilitate the registration and continued prosecution of SpinCo House Marks (e.g., in the event that any RemainCo House Mark is cited against an application for a SpinCo House Mark). Section 3.2 Limited License to Use SpinCo House Marks. RemainCo shall have the right to use the SpinCo House Marks in connection with the operation of the RemainCo Business for a limited period of 270 days following the Distribution Date. After such 270-day period, RemainCo shall discontinue all use of the SpinCo House Marks, including any use on stationery or letterhead and any use on or in connection with other RemainCo Assets. However, the Parties agree that the RemainCo Group may continue, beyond such 270-day period, to distribute copies of any existing inventory of its marketing literature, including technical papers, brochures, and printed promotional material, in existence on the Distribution Date, provided, however, that reasonable efforts are made to remove or cover up any SpinCo House Marks appearing thereon prior to distribution. Notwithstanding the foregoing provisions of this Section 3.2, in no event shall any of the members of the RemainCo Group continue to use the SpinCo House Marks (whether in any of the materials referenced in the immediately preceding sentence or otherwise) following a Change of Control of RemainCo. For the avoidance of doubt, none of the foregoing shall apply to any stationery, letterhead or marketing literature, including technical papers, brochures, and printed promotional material, distributed by any member of the RemainCo Group to its customers prior to the Distribution Date or to any SpinCo House Marks included on or in any copies of the Steam Book distributed by RemainCo or any member of the RemainCo Group prior to or after the Distribution Date. All of RemainCo's use of the SpinCo House Marks shall inure to the benefit of SpinCo. RemainCo agrees to use the SpinCo House Marks in accordance with such quality standards as are used by the SpinCo Group as of the date of this Agreement. Except as set forth in this Section 3.2, it is expressly agreed that RemainCo is not obtaining any right, title or interest in the SpinCo House Marks. 9 Section 3.3 Removal of Classes from SpinCo Marks. (a) Within sixty (60) days from the Distribution Date, SpinCo will make all necessary filings and take all necessary actions, subject to all applicable local Laws, to (i) as applicable, amend the description of goods and services to remove references to nuclear subject matter included in any existing registration for any SpinCo House Mark registered in the United States, Canada, the United Kingdom, the People's Republic of China, Romania, South Korea, Vietnam, India, Indonesia, Japan, Mexico, Norway, South Africa, Ukraine, the European Union and Argentina and (ii) as applicable, to amend or modify the description of goods and services to remove references to nuclear subject matter contained in any application pending for any SpinCo House Mark in the United States, Canada,
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Extract the exact clause related to "Ip Ownership Assignment" from the excerpt above.