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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applicable to the businesses of RemainCo and SpinCo, which information, including all Know-How and Copyrights contained therein, has application to the businesses of RemainCo and SpinCo. The Shared Library Materials identified as of the Distribution Date are set forth on Schedule 4.1, which may be amended or modified upon mutual agreement of the Parties from time to time to (i) include additional Shared Library Materials discovered after the Distribution Date or (ii) to reflect the results of the allocation process contemplated in Section 4.4 below. Section 4.2 Cross-License of Shared Library Materials. The Parties acknowledge and agree that each of RemainCo and SpinCo and additional members of the RemainCo Group and SpinCo Group presently have shared access to and rights to exploit the Shared Library Materials and may have a right and interest in and to certain Shared Library Materials, including in and to Intellectual Property embodied therein. Accordingly, (i) with respect to RemainCo's right and interest in and to the Shared Library Materials, RemainCo, for itself and as representative of all other members of the RemainCo Group, hereby grants to SpinCo (x) a perpetual (subject to Section 4.4), irrevocable, exclusive, royalty-free, worldwide right and license with the right to grant sublicenses (solely as set forth in Section 5.6) to use the Shared Library Materials, including all Know-How and Copyrights embodied therein, for any purpose in the SpinCo Core Field and (y) a perpetual (subject to Section 4.4), irrevocable, non-exclusive, royalty-free, worldwide right and license with the right to grant sublicenses (solely as set forth in Section 5.6) to use the Shared Library Materials, including all Know-How and Copyrights embodied therein, for any purpose in any field other than the RemainCo Core Field or the SpinCo Core Field and (ii) with respect to SpinCo's right and interest in and to the Shared Library Materials, SpinCo, for itself and as representative of all other members of the SpinCo Group, hereby grants to RemainCo (x) a perpetual (subject to Section 4.4), irrevocable, exclusive, royalty-free, worldwide right and license with the right to grant sublicenses (solely as set forth in Section 5.6) to use the Shared Library Materials, including all Know-How and Copyrights embodied therein, for any purpose in the RemainCo Core Field and (y) a perpetual (subject to Section 4.4), irrevocable, non- exclusive, royalty-free, worldwide right and license with the right to grant sublicenses (solely as set forth in Section 5.6) to use the Shared Library Materials, including all Know-How and Copyrights embodied therein, for any purpose in any field other than the SpinCo Core Field or the RemainCo Core Field. The foregoing licenses include the right to reproduce, prepare derivative works, distribute, perform and otherwise exploit such Shared Library Materials and to use the Shared Library Materials to design, develop, manufacture, have manufactured, sell and support products and services, subject in each case to applicable export control Laws and the provisions of Section 4.5. Section 4.3 Maintenance of Shared Library Materials. Unless mutually agreed upon by the Parties in writing, all Shared Library Materials (other than those which have been allocated pursuant to Section 4.4) shall be maintained in a mutually agreed upon location accessible to both Parties (the "Shared Location") and in a manner mutually agreeable to both Parties with respect to shared access, removal and replacement of documents and similar issues. 11 (a) Notwithstanding the foregoing, the Parties acknowledge and agree that (i) archival copies of certain Shared Library Materials are recorded on microfiche; (ii) two sets of the applicable microfiche exist as of the Distribution Time; and (iii) rather than maintaining such microfiche in a mutually agreed upon location accessible to both Parties, each Party will be entitled to maintain a copy of the microfiche at its own location, provided, however, that in the event that any Shared Library Materials are found to be missing from or otherwise inaccessible using one Party's copy of the applicable microfiche, the other Party will provide such Party with access to the microfiche in its possession for copying, with all copying costs to be paid by the Party seeking to obtain the copy. (b) RemainCo and SpinCo agree to share all costs and expenses of maintaining the Shared Library Materials on an equal basis and to share all costs and expenses of maintaining the Shared Location as set forth in Schedule 6.3 of the Master Separation Agreement. In the event that one Party is responsible vis-a-vis a Third Party for the payment of costs and expenses related to the Shared Location, such
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Extract the exact clause related to "Ip Ownership Assignment" from the excerpt above.