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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from time to time, provided that in the event that Sponsor changes its name, the cost of effectuating the change of such Sponsor Marks shall be borne by Sponsor. (q) "Sponsorship Fee" has the meaning set forth in Section 5(a) of this Agreement. (r) "Sponsorship Rights" has the meaning set forth in Section 3(a) of this Agreement. (s) "Stadium" has the meaning set forth in the Recitals. (t) "Team" has the meaning set forth in the Recitals. (u) "Team Companies" shall mean, collectively, Forty Niners SC and the Team. (v) "Team Marks" means those trademarks and services marks set forth in Schedule 2. Confidential Treatment Requested. Confidential portions of this document have been redacted and have been separately filed with the Commission. *** Confidential material redacted and filed separately with the Commission. 2. Term. (a) This Agreement shall commence on the "Effective Date" and shall continue for ten (10) Contract Years, unless terminated in accordance with the provisions of Section 6 of this Agreement or extended by renewal by written agreement of the Parties in accordance with the provisions of Section 13(o) of this Agreement (the "Term"). (b) Provided the Agreement is not earlier terminated in accordance with its terms, *** shall have ***, from ***, to *** for the period ***. During such period, ***. The parties agree and acknowledge that ***. Nothing herein shall prevent Team from *** at any time, provided Team does not ***. Nothing herein shall prevent Team from ***, so long as such *** is limited to stating that the ***. 3. Grant of Sponsorship Rights. (a) From the commencement of the first Contract Year through the end of the Term, Forty Niners SC will provide (or cause to be provided) to Sponsor those sponsorship rights ("Sponsorship Rights") as set forth in Schedule 1 to this Agreement. (b) License to Use Team Marks. From the commencement of the first Contract Year through the end of the Term, Forty Niners SC grants to Sponsor a limited license during the Term to (a) advertise and promote the fact that Sponsor is an "official sponsor of the San Francisco 49ers," (b) use, reproduce and display the Team Marks in connection with advertising and promotion of Sponsor's goods and services in the Product and Services Category, and (c) promote Sponsor's sponsorship, subject to the terms and conditions of use set forth herein. (c) No-Signage Events. Sponsor acknowledges and agrees that SCSA (directly or through its appointed manager) may determine in its sole discretion that certain events at the Stadium (other than Team events) from time to time (each referred to herein as a "No-Signage Event"), including, but not limited to the Olympic Games, World Cup Soccer, NCAA championships, college football bowl games, college football championship games and other events, may require that signage and advertising be covered, obscured or temporarily removed during the event or may prohibit signage or advertising for any party other than a sponsor of the event itself. Sponsor agrees that it shall not be entitled to Sponsorship Rights, signage or other advertising benefits in or around the Stadium for a reasonable period before, during and after a No-Signage Event. (d) Does Not Cover Other Professional Sports Teams. Sponsor acknowledges and agrees that the Sponsorship Rights granted hereunder do not include any rights or benefits related to or in connection with any other professional sports team that may, from time to time, play its home games in the Stadium. SCSA and/or such other team shall have the right to grant Stadium-related rights and benefits to another sponsor within the Product and Services Category with respect to such other team's home games played at the Stadium. (e) Grant of License by Sponsor. In order for Forty Niners SC to fulfill its obligations hereunder, Sponsor hereby grants to Forty Niners SC a limited license during the Confidential Treatment Requested. Confidential portions of this document have been redacted and have been separately filed with the Commission. *** Confidential material redacted and filed separately with the Commission. Term to use, reproduce and display the Sponsor Marks in connection with advertising and promotion of Sponsor and its sponsorship. 4. Exclusivity. (a) Exclusive Sponsor of the Team. Forty Niners SC acknowledges and agrees that, except as otherwise provided herein, the rights granted to Sponsor herein are exclusive to Sponsor within the Product and Services Category with respect to Forty Niners SC at the Stadium. Forty Niners SC shall not enter into a sponsorship agreement with a party with respect to the
"""

Extract the exact clause related to "Expiration Date" from the excerpt above.

assistant: This Agreement shall commence on the "Effective Date" and shall continue for ten (10) Contract Years, unless terminated in accordance with the provisions of Section 6 of this Agreement or extended by renewal by written agreement of the Parties in accordance with the provisions of Section 13(o) of this Agreement (the "Term").