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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your use of any Mark, notify the telephone company and all listing agencies and directory publishers including Internet domain name granting authorities, Internet service providers, global distribution systems, and web search engines of the termination or expiration of your right to use the Marks, the Trade Name, and any telephone number, any classified or other telephone directory listings, Internet domain names, uniform resource locators, website names, electronic mail addresses and search engine metatags and keywords associated with the Hotel, and authorize their transfer to us; and 14.6.7 irrevocably assign and transfer to us (or to our designee) all of your right, title and interest in any domain name listings and registrations that contain any reference to our Marks, System, Network or Brand; notify the applicable domain name registrars of the termination of your right to use any domain name or Sites associated with the Marks or the Brand; and authorize and instruct the cancellation of the domain name, or transfer of the domain name to us (or our designee), as we specify. You will also delete all references to our Marks, System, Network or Brand from any Sites you own, maintain or operate beyond the expiration or termination of this Agreement. 15.0 INDEMNITY 15.1 Beginning on the Effective Date, you must indemnify the Indemnified Parties against, and hold them harmless from, all losses, costs, liabilities, damages, claims, and expenses, including reasonable attorneys' fees, expert fees, costs and other expenses of litigation arising out of or resulting from: 15.1.1 any breach by you of this Agreement, the Manual or the Standards; 15.1.2 any act or omission of you or your officers, employees, Affiliates, associates or agents in any way arising out of or relating to this Agreement; 15.1.3 any claimed occurrence at the Hotel including personal injury, death or property damage; 15.1.4 your alleged or actual infringement or violation of any patent, Mark or copyright or other proprietary right owned or controlled by third parties; 15.1.5 your alleged or actual violation or breach of any contract (including any group sales agreement for the System), any Law, or any industry standard; 15.1.6 any business conducted by you or a third party in, on or about the Hotel or Hotel Site and 25 15.1.7 your failure to comply with Subsection 17.13, including a breach of the representations set forth therein. 15.2 You do not have to indemnify an Indemnified Party to the extent damages otherwise covered under this Section 15 are adjudged by a final, non-appealable judgment of a court of competent jurisdiction to have been solely the result of the gross negligence or willful misconduct of that Indemnified Party, and not any of the acts, errors, omissions, negligence or misconduct of you or anyone related to you or the Hotel. You may not rely on this exception to your indemnity obligation if the claims were asserted against us or any other Indemnified Party on the basis of theories of imputed or secondary liability, such as vicarious liability, agency, or apparent agency, or our failure to compel you to comply with the provisions of this Agreement, including compliance with Standards, Laws or other requirements. 15.3 You will give us written notice of any action, suit, proceeding, claim, demand, inquiry or investigation involving an Indemnified Party within five (5) days of your knowledge of it. At our election, you will defend us and/or the Indemnified Parties against the same or we may elect to assume (but under no circumstance will we be obligated to undertake) the defense and/or settlement of the action, suit, proceeding, claim, demand, inquiry or investigation at your expense and risk. 15.4 If we think our respective interests conflict, we may obtain separate counsel of our choice. This will not diminish your obligation to indemnify the Indemnified Parties and to hold them harmless. You will reimburse the Indemnified Parties on demand for all expenses, including reasonable attorneys' fees, expert fees, costs and other expenses of litigation, the Indemnified Parties incur to protect themselves or to remedy your defaults. The Indemnified Parties will not be required to seek recovery from third parties or otherwise mitigate their losses to maintain a claim against you, and their failure to do so will not reduce the amounts recoverable from you by the Indemnified Parties. 15.6 Your obligations under this Section 15 will survive expiration or termination of this Agreement. 16.0 RELATIONSHIP OF THE PARTIES 16.1 No Agency Relationship. You are an independent contractor. Neither Party is the legal representative or agent of the other Party
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Extract the exact clause related to "Ip Ownership Assignment" from the excerpt above.

assistant: irrevocably assign and transfer to us (or to our designee) all of your right, title and interest in any domain name listings and registrations that contain any reference to our Marks, System, Network or Brand; notify the applicable domain name registrars of the termination of your right to use any domain name or Sites associated with the Marks or the Brand; and authorize and instruct the cancellation of the domain name, or transfer of the domain name to us (or our designee), as we specify