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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operations, networks, systems, facilities, products, rates, regulatory compliance, competitors, consumer markets, assets, expenditures, mergers, acquisitions, divestitures, billings, collections, revenues and finances of AT&T; and (ii) not supplied by AT&T or any of its customers but created, generated, collected or harvested by Vendor either (a) in furtherance of this Agreement or (b) as a result of Vendor's having access to AT&T infrastructure, systems, data, hardware, software or processes (for example, through data processing input and output, service level measurements, or ascertainment of network and system information). (ii) "AT&T Derived Data" means any data or information that is a result of any modification, adaption, revision, translation, abridgement, condensation, compilation, evaluation, expansion or other recasting or processing of the AT&T Data, for example, as a result of Vendor's observation, analysis, or visualization of AT&T Data arising out of the performance of Vendor's obligations hereunder. (b) Ownership of AT&T Data and AT&T Derived Data. (i) AT&T Data is the property of AT&T. To the extent needed to perfect AT&T's ownership in AT&T Data, Vendor hereby assigns all right, title and interest in AT&T Data to AT&T. No transfer of title in AT&T Data to Vendor is implied or shall occur under this Agreement. AT&T Data shall not be (a) utilized by Vendor for any purpose other than as required to fulfill its obligations under this Agreement, (b) sold, assigned, leased, commercially exploited or otherwise provided to or accessed by third parties, whether by or on behalf of Vendor, (c) withheld from AT&T by Vendor, or (d) used by Vendor to assert any Lien or other right against or to it. Vendor shall promptly notify AT&T if Vendor believes that any use of AT&T Data by Vendor contemplated under this Agreement or to be undertaken as part of the performance of this Agreement is inconsistent with the preceding sentence. (ii) AT&T shall own all right, title and interest in and to the AT&T Derived Data. To the extent needed to perfect AT&T's ownership in AT&T Derived Data, Vendor hereby assigns all right, title and interest in AT&T Derived Data to AT&T. AT&T grants to Vendor a license to access, use, and copy the AT&T Derived Data, with no right to grant sublicenses, solely for the performance of Vendor's obligations during the Term of this Agreement and solely in compliance with AT&T's privacy policies, including obligations relating to Customer Information. For the avoidance of doubt, Vendor shall not create or develop AT&T Derived Data after the expiration or termination of this Agreement. (iii) Vendor shall promptly deliver AT&T Data and AT&T Derived Data to AT&T at no cost to AT&T, and in the format, on the media and in the timing prescribed by AT&T (i) at any time at AT&T's request, (ii) at the expiration or termination of this Agreement and the completion of any requested termination assistance services or (iii) with respect to particular AT&T Data or AT&T Derived Data, at such earlier date that such data is no longer required by Vendor to perform the Services. Thereafter, Vendor shall return or destroy, as directed by AT&T, all copies of the AT&T Data and AT&T Derived Data in Vendor's possession or under Vendor's control within ten (10) business days and deliver to AT&T written certification of such return or destruction signed by an officer of Vendor. Proprietary and Confidential This Agreement and information contained therein is not for use or disclosure outside of AT&T, its Affiliates, and third party representatives, and Vendor except under written agreement by the contracting parties. 62 Source: ATN INTERNATIONAL, INC., 10-Q, 11/8/2019 (iv) The provisions of this Section shall apply to all AT&T Data and AT&T Derived Data, regardless of whether such data was first disclosed or otherwise provided to, or created, developed, modified, recast or processed by, Vendor before, on or after the Effective Date of this Agreement, and shall survive the expiration or termination of this Agreement. Vendor shall secure AT&T Data and AT&T Derived Data pursuant to the provisions applicable to AT&T Information under the Section titled "AT&T Supplier Information Security Requirements (SISR)." Vendor's obligation to return AT&T Data and AT&T Derived Data upon AT&T's request shall not apply to such data which, at the time of AT&T's request for return, is no longer retained by or on behalf of Vendor. 4.26 Business Continuity Plan. Vendor shall maintain and upon AT&T's request, promptly furnish to AT&T Supplier's Business Continuity Plan that complies with the requirements set forth in Appendix F - Business Continuity Plan Requirements (BCPR) available
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Extract the exact clause related to "Liquidated Damages" from the excerpt above.

assistant: Not found.