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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EXHIBIT 10.1 Sponsorship Agreement Parties This Agreement is effective as of December 1st, 2015 by and between RMF Empire, Inc. DBA West Coast Customs, located at 2101 West Empire Avenue, Burbank, CA 91504 (hereinafter "WCC"), and Bosch International, LLC / XLI Technologies, Inc. located at 3753 Howard Hughes Parkway, Suite 200 Las Vegas, NV 89169 (hereinafter "XLI"). Recitals A. XLI is engaged in the distribution and marketing of "Light Sheets". B. It is the desire and intention of both parties that WCC cooperates with XLI in the marketing and promotion of XLI products and technology ("PROMOTION"). C. In connection with the PROMOTION, WCC and XLI further desire to enter into a relationship to the mutual benefit of both parties. THEREFORE, in consideration of the mutual promises and undertakings contained herein, and for other good and valuable consideration, the parties agree as follows: 1. Promotional Consideration 1.1 Grant of License. 1.1.1 WCC grants a limited, non-exclusive license to XLI to use the West Coast Customs name, image, likeness and signature, including specific West Coast Customs Trademarks (including West Coast Customs logo trademarks and approved West Coast Customs vehicle imagery and trademarks) (collectively the "Trademarks") during the term of this Agreement in connection with national, regional or local print advertising, together with Internet, television, video and on-site event advertising, only in connection with the PROMOTION, subject to all of the terms and conditions hereof. This license shall terminate automatically upon the expiration or termination of this Agreement, at which time XLI shall cease all use of the Trademarks. In further consideration of this Agreement, XLI shall not in any way disparage the Trademarks, nor any of WCC's parent, subsidiary, or affiliated companies' trademarks or its or their products. WCC shall provide XLI with all applicable logos and usage guidelines for the Trademarks. WCC shall have the right of prior written approval over all uses of the Trademarks by XLI. The parties understand and acknowledge the importance of protecting the goodwill associated with their respective trademarks. Consequently, XLI hereby assigns to WCC all goodwill and all other rights developed in connection with XLI's use of WCC's trademarks which shall inure to the benefit of WCC. 1.1.2 XLI grants WCC a limited, non-exclusive, royalty-free license to use the registered trademark "Light Sheets" during the term of this Agreement in connection with national, regional or local print advertising, together with Internet, television, video and on-site advertising, for WCC and its Event(s) during the term of this Agreement, subject to all of the terms and conditions hereof. This license shall terminate automatically upon the expiration or termination of this Agreement, at which time WCC agrees to cease all use of the registered trademark "Light Sheets". In further consideration of this Agreement, WCC agrees that it shall not in any way disparage the brand name "XLI", nor any of XLI's parent, subsidiary, or affiliated companies or its or their products. XLI shall provide WCC with all the applicable logos for the "Light Sheets" trademark. XLI shall have the right of prior written approval over all uses of the trademark "XLI" by WCC. The parties understand and acknowledge the importance of protecting the goodwill associated with their respective trademarks. Consequently, WCC hereby assigns to XLI all goodwill and all other rights developed in connection with WCC's use of XLI's trademarks which shall inure to the benefit of XLI. 1 1.1.3 Sponsor Identification. WCC shall ensure that all WCC public communications shall make reference to XLI products as "Light Sheets", as further defined in Attachment A [Sponsor Benefits Schedule] attached hereto and incorporated herein by reference. 1.2 Additional Promotional Support. In addition to the items set forth in Section 1.1.3, WCC shall promote XLI as outlined in the Sponsor Benefits Schedule, attached hereto as Attachment A, which shall be deemed an extension of this Agreement. In the event of a conflict between said Sponsor Benefits Schedule and this Agreement, the Sponsor Benefits Schedule shall control. 2. Term and Termination 1. Term. Unless earlier terminated, this Agreement shall take effect on December 1st, 2015 and shall expire on November 30, 2016. XLI and/or WCC may renegotiate and/or cancel this Agreement at any time during its term, in the event any of the following conditions occur: 1. Any significant changes to the Benefits Schedule which cannot be cured as stated in Section 2.2 (Termination upon Breach) 2. By mutual consent of WCC and XLI to pursue other arrangements. 3. In the event either party becomes bankrupt or insolvent. 2.2 Termination upon
"""

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

assistant: December 1st, 2015