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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Licensee shall not alter, remove or obstruct any such notices or attribution included with any Content Item as delivered by Licensor. 5 Source: GO-PAGE CORP, 10-K, 2/21/2014 4.3 Terms of Use. Throughout the Term, Licensee shall have in effect and maintain accessible on the Licensee Site and Related Media website terms of use ("Terms of Use") and privacy policy ("Privacy Policy") on which use of the Licensee Site and Related Media, including the Licensed Content, is expressly conditioned, and which in form and substance are reasonably acceptable to Licensor. 4.4 Content Hosting and Support; User Complaints. Throughout the Term, Licensee shall host, operate, maintain and make accessible to End Users the Licensed Content on the Licensee Site. The service level standards and procedures used by Licensee with respect to the Licensed Content, including but not limited to those regarding End User requests and communications, will be consistent with those it employs with respect to other content on the Licensee Site. Without limiting the foregoing, if Licensee receives any notice claiming that the Licensed Content infringes or otherwise violates any intellectual property or other third-party right, Licensee shall: (a) immediately notify Licensor in writing (which may include e-mail), including such detail as is available and necessary for Licensor to evaluate and address such complaint; and (b) fully cooperate with Licensor in addressing such claims. 5. Fees and Payment. 5.1 License Fees. In consideration of the licenses granted and other undertakings by Licensor hereunder, Licensee shall pay Licensor a License Fee in the amount of two hundred thousand dollars (US$200,000) ("License Fee"). The License Fee shall be due and payable as follows: (a) US$50,000 upon signing the Memorandum of Understanding ("MOU") between the Parties (provided, however, that Licensor hereby acknowledges receipt of this portion of the License Fee); (b) US$50,000 upon signing of this Agreement; and (c) US$100,000 upon on or before March 28, 2014. The License Fees are non-cancellable and non-refundable. 6 Source: GO-PAGE CORP, 10-K, 2/21/2014 5.2 In addition to the License Fee payable in accordance with Section 5.1, Licensee shall pay a royalty ("Royalty") to Licensor according to the following schedule ("Royalty Schedule"): Subscribers Royalty Payable as Percentage of Gross Revenue 0 - 5000 6.25% 5001 - 7500 6.75% 7501 - 10,000 7.00% 10,001 - 15,000 8.00% 15,001 - 20,000 8.50% 20,001 - 25,000 9.25% 25,001+ 9.75% 5.3 Reports and Payment (a) Not later than the fifteenth (15th) calendar day of each calendar quarter (or the first business day thereafter), Licensee shall deliver to Licensor (i) a report accurately showing Gross Revenues of the Licensee for the previous quarter, the number of Subscribers on the last day of such previous quarter and the amount of Royalties due thereon, and (ii) payment of the Royalties payable for such previous quarterbased on the Subscriber information as reflected in the report. All payments under this Agreement shall be made in US dollars. (b) If Licensee fails to make any payment when due: (i)Licensor shall have the right to terminate this Agreement and all licenses granted hereunder as provided in Section 6.2; and] (ii)If any License Fees or Royalties are more than ten (10) days past due, Licensor may assess interest on the past due amount at the rate of one and a half percent (1.5%) per month or, if lower, the highest rate permitted under applicable Law. 7 Source: GO-PAGE CORP, 10-K, 2/21/2014 5.4 Taxes. All License Fees are exclusive of sales, use, value added, and similar taxes, which are the responsibility of Licensee. If Licensee is required under any applicable Law to withhold any amount from such payment, Licensee shall hold such funds in trust for Licensor and shall cooperate with Licensor in completing and filing all forms and other documents required for the release of the funds withheld for payment to Licensor. 5.5 Audit Right. During the Term and for five (5) years thereafter, Licensee shall maintain complete and accurate books and records regarding its business operations relevant to the calculation of License Fees and any other information required to be reported to Licensor under this Agreement. Licensee shall make such books and records, and appropriate personnel, available during normal business hours for audit by Licensor or its authorized representative; provided that Licensor shall: (a) provide Licensee with reasonable prior notice of any audit; (b) undertake an audit no more than once per calendar year, unless a prior audit has disclosed a balance due; and (c) conduct or cause to be conducted such audit in a manner designed to minimize
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Extract the exact clause related to "Irrevocable Or Perpetual License" from the excerpt above.

assistant: Not found.