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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(2nd) anniversary of the Commencement Date. The "Commencement Date" means the date on which Excite commences delivery of Impressions (defined below). The parties anticipate the Commencement Date will be on or about October 15, 1997. c) The parties' existing agreements regarding sponsorship of the WebCrawler Web site (http://webcrawler.com) and all of the existing advertising buys on the Excite Network will be terminated as of the Commencement Date. Excite will credit Sponsor in an amount equal to [****]. This credit will be applied to reduce the first year exclusivity fee described in Section 7(b) and will be reflected in a reduction of Sponsor's December 31, 1997 payment to Excite described in Section 7(e). d) Excite will offer Sponsor the right of first refusal to negotiate with Excite for renewal of this sponsorship. 2 3 CONFIDENTIAL i) Excite will not propose, solicit or negotiate offers from entities other than Sponsor for any retail music store sponsorships of the Excite Site, if at all, until [****] prior to the expiration of the term of this Agreement. ii) Commencing not later than [****] prior to the expiration of the term of the Agreement, Excite will negotiate with Sponsor in good faith with respect to the terms and conditions under which this Agreement would be renewed. Excite will negotiate exclusively with Sponsor for the next [****] in good faith effort to negotiate and execute a written sponsorship renewal agreement. If, [****] prior to the expiration of the term of the Agreement, the parties have not entered into a written sponsorship renewal agreement. Excite may enter into negotiations with any third party with respect to retail music store sponsorships of the Excite Site. iii) In the event that Excite intends to enter into an agreement with a third party with respect to retail music store sponsorships of the Excite Site before the expiration of the term of the Agreement, Excite will deliver to Sponsor a written notice describing the relevant opportunity. Although Excite will not be required to disclose any information in violation of any nondisclosure agreement between Excite and any third party, the notice will include information sufficient to permit Sponsor to evaluate the requirements for meeting the competing offer for retail music store sponsorship of the Excite Site and to formulate a meaningful response. Sponsor will have [****] after receipt of such written notice to provide notice to Excite that it is prepared to enter into an agreement with Excite on the same terms and conditions as Excite proposes to accept from such third party. Excite and Sponsor will then promptly commence good faith negotiations to conclude the agreement. iv) If Sponsor rejects said offer or fails to notify Excite of its acceptance within the [****] period, Excite shall have the right thereafter to enter into the agreement with such third party, provided the terms and conditions of the agreement (if entered into within the subsequent ninety (90) days) are not less favorable to Excite than previously offered by Sponsor. 3 4 CONFIDENTIAL 2. IMPRESSIONS a) "Impression" means any appearance of a link to the Sponsor Site whether graphic, text or any combination of graphic and text. More than one Impression may appear on a page, except, however, not more than three (3) Impressions per Channel page will count towards delivery of guaranteed Impressions and, of these 3 Impressions, at least two (2) will link to pages in the Sponsor Site offering Music Products; not more than two (2) Impressions per generic search results page will count towards delivery of guaranteed Impressions and, of these 2 Impressions, at least one (1) will link to pages in the Sponsor Site offering Music Products; and no more than one (1) Impression per specific search results page will count towards delivery of guaranteed Impressions. In all events, Excite will make a good faith effort to avoid duplicate Impressions on a single page, but in no event will more than one (1) Impression for the same artist on a Music Product page count towards delivery of guaranteed Impressions. For the purposes of this Agreement, "generic search results page" is an Excite Search results page displayed in response to a query concerning generic music topics and a "specific search results page" is an Excite Search results page displayed in response to a query concerning a specific music artist or specific album title. b) Excite and Sponsor will work together in good faith to define mutually agreeable Impressions in the Excite Site designed to provide content of interest (defined below)
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Extract the exact clause related to "Notice Period To Terminate Renewal" from the excerpt above.