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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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 Party will provide to the other Party a statement of all costs and expenses incurred in connection with the Shared Location as set forth in Schedule 6.3 of the Master Separation Agreement. The other Party will reimburse the responsible Party for the applicable percentage of such costs and expenses within thirty (30) days of receipt of such statement, unless otherwise agreed upon by the Parties. (c) Without limiting this Section 4.3, the Parties agree that as of the Distribution Time, the Shared Location will be the Iron Mountain storage facility located at Boyers, Pennsylvania, which will be maintained pursuant to an agreement between RemainCo and Iron Mountain for the 137RC account and by SpinCo for the 1100 account. RemainCo and SpinCo shall share all costs and expenses related to storing the Shared Library Materials with Iron Mountain in a manner consistent with Section 4.3(b) above. Section 4.4 Potential Allocation of Shared Library Materials. The Parties acknowledge and agree that the Shared Library Materials may contain limited material that could be allocated solely to one Party with respect to ownership and use. In the event that one Party (the "Notifying Party") discovers an item of Shared Library Material which it believes should be allocated to one Party based upon a good faith belief that such items belongs to or relates exclusively to the business of such Party, the Notifying Party will notify the other Party (the "Reviewing Party") of the item and the proposed allocation, including the Notifying Party's rationale, in writing and designate at least one representative from the relevant operating division to negotiate the proposal. The Reviewing Party will designate at least one representative from the relevant operating division to review and negotiate the proposed allocation. The Parties, including the designated representatives, shall negotiate regarding the Notifying Party's proposal in good faith. In the event that the Parties mutually agree that the Notifying Party's proposal is valid, the applicable item of Shared Library Material (i) shall be deemed to be owned by the specified Party, (ii) shall no longer constitute Shared Library Material; (iii) shall be permanently removed from the Shared Location by the specified Party and (iv) shall be removed from Schedule 4.1, provided, however, that the foregoing shall not limit a Party's existing use of any Shared Library Material or obligate any Party to cease utilizing any derivative works of such 12 Shared Library Material made prior to the date of agreement regarding the Notifying Party's proposal. In the event that the Parties do not agree that the Notifying Party's proposal is valid, the applicable item shall remain Shared Library Material under the terms of this Agreement. Without limiting the foregoing, the Parties agree and acknowledge that the Shared Library Materials may contain design standards and design manuals related solely to nuclear content set forth on Schedule 4.4 (collectively, the "Nuclear Design Manuals"), and that such Nuclear Design Manuals are deemed to be owned by RemainCo, subject only to SpinCo's right to confirm that such Nuclear Design Manuals, including each page therein, are marked with the engineering standards series and numbering set forth on Schedule 4.4. SpinCo's right to such confirmation is expressly limited to confirmation of the engineering standards series and numbering system contained in or on such Nuclear Design Materials for purposes of confirmation of the document's identification and does not include the right to analyze, review, or approve any of the content contained in any such Nuclear Design Manual. Section 4.5 Confidentiality and Trade Secret Status of Shared Library Materials. The Parties acknowledge that the Research Documents contained within the Shared Library Materials likely
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Extract the exact clause related to "Ip Ownership Assignment" from the excerpt above.