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:
"""
THE INSTALLATION OF ANY CALL CENTER SYSTEM, THEIR RESALE BY RESELLER, OR THEIR USE BY ANY CUSTOMER OR OTHER END USER. TOUCHSTAR SHALL NOT BE LIABLE FOR THE PROVISION OF SERVICES BY RESELLER OR ANY OTHER RESELLER, OR ANY ALTERATIONS OR MODIFICATIONS BY RESELLER TO THE TOUCHSTAR SOFTWARE OR ANY CALL CENTER SYSTEM. THE SOLE OBLIGATION OF TOUCHSTAR, AND THE SOLE REMEDY OF RESELLER OR ANY OTHER RESELLER, UNDER THIS AGREEMENT SHALL BE (A) WITH REGARD TO THE TOUCHSTAR SOFTWARE OR ANY CALL CENTER SYSTEM, THE REPLACEMENT OR REPAIR OF THE TOUCHSTAR SOFTWARE OR THE CALL CENTER SYSTEM OR, AT THE OPTION OF TOUCHSTAR, THE RETURN OF THE PURCHASE PRICE PAID BY RESELLER 14 FOR SUCH TOUCHSTAR SOFTWARE OR CALL CENTER SYSTEM AND (B) WITH REGARD TO SERVICES, THE REPERFORMANCE OF THE SERVICES. 7. INTELLECTUAL PROPERTY RIGHTS. 7.1 OWNERSHIP OF INTELLECTUAL PROPERTY. (a) Reseller acknowledges that TouchStar owns or has rights to license the intellectual property and proprietary rights in, to, and relating to the TouchStar Software and Support Services, including, but not limited to, the Intellectual Property Rights. (b) To the extent that Reseller or any Other Reseller is deemed to be the owner of all or any portion of the TouchStar Software, any Intellectual Property Rights of TouchStar or any Ancillary Software, or any improvements or intellectual property rights related thereto pursuant to applicable law, Reseller (i) hereby assigns exclusively to TouchStar all rights of Reseller in and to such Software and any improvements and intellectual property rights related thereto royalty-free and exclusively and (ii) shall include in any Other Reseller Agreement provision by which any Other Reseller grants to TouchStar an exclusive, perpetual, irrevocable, royalty-free assignment of all deemed rights of such Other Reseller in and to such TouchStar Software, Ancillary Software and Intellectual Property Rights. Reseller shall execute, and shall cause any Other Reseller to execute, any such documents and instruments necessary to vest in TouchStar the deemed ownership rights of Reseller or Other Reseller in and to any TouchStar Software, Ancillary Software or Intellectual Property Rights, and any improvements or intellectual property rights related thereto. 7.2 PRIVATE LABELING. At the request of Reseller, TouchStar shall use reasonable commercial efforts to provide a private label version of the TouchStar Software (the "Private Label Software") using logos, trademarks, trade names or service marks owned by Reseller or to which Reseller has exclusive rights (the "Reseller Marks"). Reseller represents and warrants that Reseller has valid legal ownership and other exclusive rights to the Reseller Marks. Reseller grants to TouchStar a right and license to use the Reseller Marks in the preparation of the Private Label Software. Reseller shall have the right to promote, market, distribute and resell the Private Label Software pursuant to the terms and conditions of this Agreement. Reseller shall reimburse TouchStar for all costs and expenses incurred by TouchStar in making the Private Label Software available to Reseller. Except for the Reseller Marks, TouchStar shall retain all right, title and interest in and to the Private Label Software. Reseller shall indemnify, defend and hold harmless TouchStar, its Affiliates, and its and their respective directors, officers, employees, agents and representatives from and against any and all claims, suits, proceedings, costs and expenses arising out of or relating to the use by TouchStar of the Reseller Marks. TouchStar may include in the Private Label Software a legend to the effect that TouchStar owns the Private Label Software. 15 7.3 USE OF TOUCHSTAR INTELLECTUAL PROPERTY RIGHTS. Reseller shall use the Intellectual Property Rights only to refer to the TouchStar Software in accordance with TouchStar's policies as announced from time to time. In particular, and without limitation, Reseller shall not (a) remove Trademarks from any Marketing Materials, (b) include any Trademarks or other Intellectual Property Rights in any promotional literature prepared by Reseller without the express written consent of TouchStar; (c) dispute or deny the validity of any of the Intellectual Property Rights (including any attempt to register or record the same in any jurisdiction), (d) do any act or omit to do any act whereby TouchStar's right, title, and interest in the Intellectual Property Rights may become invalidated or otherwise adversely affected, (e) alter, remove, destroy, conceal, or tamper with any Trademarks, (f) use any Intellectual Property Rights in any way which might prejudice their distinctiveness or validity or goodwill of TouchStar therein, (g) use in relation to Support Services any patents, copyrights, trademarks, or trade names other than the Intellectual Property Rights without TouchStar's prior written consent,
"""

Extract the exact clause related to "Irrevocable Or Perpetual License" from the excerpt above.

assistant: To the extent that Reseller or any Other Reseller is deemed to be the owner of all or any portion of the TouchStar Software, any Intellectual Property Rights of TouchStar or any Ancillary Software, or any improvements or intellectual property rights related thereto pursuant to applicable law, Reseller (i) hereby assigns exclusively to TouchStar all rights of Reseller in and to such Software and any improvements and intellectual property rights related thereto royalty-free and exclusively and (ii) shall include in any Other Reseller Agreement provision by which any Other Reseller grants to TouchStar an exclusive, perpetual, irrevocable, royalty-free assignment of all deemed rights of such Other Reseller in and to such TouchStar Software, Ancillary Software and Intellectual Property Rights.