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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provided herein, the following words and terms used in this Contract shall have the meanings set forth below: Article 2 "Affiliate" means, in relation to Party A, any enterprise or other entity which, directly or indirectly, controls, or is controlled by, Party A; the term "control" meaning ownership of fifty percent (50%) or more of the registered capital or voting stock or the power to appoint the general manager, factory chief or other principal person in charge of an enterprise or other entity. Page 2 "Affiliate" means, in relation to Party B, any company which, through ownership of voting stock or otherwise, directly or indirectly, is controlled by, under common control with, or in control of, Party B; the term "control" meaning ownership of fifty percent (50%) or more of the voting stock or the power to appoint or elect a majority of the directors or the power to direct the management of a company. Article 3 "Articles of Association" means the Articles of Association of the Joint Venture Company signed by Party A and Party B simultaneously with this Contract in Baoding, People's Republic of China. Article 4 "Board of Directors" means the board of directors of the Joint Venture Company. Article 5 "Business License" means the business license of the Joint Venture Company issued by the State Administration for Industry and Commerce or the competent local Administration for Industry and Commerce. Article 6 "CEO" means the general manager of the Joint Venture Company. "Deputy CEO" means the deputy general manager of the Joint Venture Company. Article 7 " China" or "PRC" means the People's Republic of China. Article 8 "Company Establishment Date" means the date of issuance of the Business License. Article 9 "Contract Term" means the term of this Contract as set forth in Chapter 18, including any extension thereof. Article 10 "Effective Date" means the effective date of this Contract, which shall be the date on which this Contract and the Articles of Association have been approved by the Examination and Approval Authority. Page 3 Article 11 "Examination and Approval Authority" means the Ministry of Foreign Trade and Economic Co-operation or other foreign trade and economic department with authority to approve this Contract and the Articles of Association. Article 12 "Plant" means [definition to be added]. Article 13 "Joint Venture Company" means [FengFan - Valence Battery Company, Ltd.], the Sino-foreign equity joint venture limited liability company formed by Party A and Party B pursuant to this Contract. Article 14 "Joint Venture Products" means technologically advanced batteries, including but not limited to lithium phosphate batteries, lithium cobalt oxide batteries and lithium manganese oxide batteries. Article 15 "Management Personnel" means the Joint Venture Company's CEO, Deputy CEO, Chief Financial Officer and other management personnel who report directly to the CEO. Article 16 "Renminbi" or "RMB" means the lawful currency of China. Article 17 "Site" means [definition to be added]. Article 18 "Contract for Technology Investment" means the contract for investment of technology in the form of technology license and services, signed by Party B and Party A simultaneously with the signature of this Contract, and which shall be ratified by the Board of Directors of the Joint Venture Company following its establishment, pursuant to which Party B will license to the Joint Venture Company the right to use the proprietary technology (including patented technology), related documentation and operational know-how, and provide technologically advanced management support and technical assistance for the production of the Joint Venture Products, which contract is attached hereto as Appendix 2. Page 4 Article 19 "Third Party" means any natural person, legal person or other organisation or entity other than the Parties to this Contract or the Joint Venture Company Article 20 "Three Funds" means the Joint Venture Company's reserve fund, expansion fund and employee bonus and welfare fund as stipulated in the Joint Venture Regulations. Article 21 "United States Dollars" or "US$" means the lawful currency of the United States of America. Article 22 "Working Personnel" means all employees and staff of the Joint Venture Company other than the Management Personnel. CHAPTER 4 ESTABLISHMENT AND LEGAL FORM OF THE JOINT VENTURE COMPANY Article 23 The Parties hereby agree to establish the Joint Venture Company in accordance with the laws and regulations of the PRC. Article 24 Name of Joint Venture Company in Chinese characters: [**[VALENCE IN CHINESE] ********] Joint Venture Company in English: [FENGFAN - VALENCE BATTERY COMPANY, LTD.] Legal address of Joint Venture Company: [Baoding City High and New Technology Zone, Baoding City,
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Extract the exact clause related to "Effective Date" from the excerpt above.