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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JOINT DEVELOPMENT AND MARKETING AGREEMENT BETWEEN LECLANCHÉ SA AND OAK RIDGE ENERGY TECHNOLOGIES, INC. 1 1. 1.1. 1.2. 1.3. This AGREEMENT is made on April 6, 2014, ("Effective Date" between: LECLANCHÉ S.A., being a company organized and existing under the laws of Switzerland, having its registered office at Avenue des Sports 42, 1400 Yverdon-les-Bains, Switzerland ("Leclanché"), and OAK RIDGE ENERGY TECHNOLOGIES INC, being a company organized and existing under the laws of United States of America, having its registered office at 751 North Drive, Suite 9, Melbourne, FL 32934, United States ("Oak Ridge"), each a "Party"" and together "Parties". WHEREAS Oak Ridge focuses on the licensing, further development, manufacturing and marketing of products incorporating thin film battery technologies. WHEREAS Leclanché has developed and markets lithium-ion titanate cells using a proprietary technology and process and also designs and develops customized battery systems for OEM and other customers; WHEREAS Leclanché is interested in marketing its products and services in the United States; WHEREAS Oak Ridge is keen to develop its business and has the capability to market and support Leclanché market entry into the United States and is committed to allocate specific resources to provide such services; WHEREAS both Parties wish to collaborate together to better evaluate the opportunities in the United States, assess how best to address these and generally support each other's business efforts in furtherance of supporting their respective customers based in North America; NOW THEREFORE it is agreed as follows: Definitions The term "Affiliate" as used herein with respect to a party means any partnership, joint venture, corporation of other form of enterprise that directly or indirectly controls, is controlled by or is under common control with such entity or person. For purposes hereof, "control" means the possession, directly or indirectly, of the power to direct or cause the direction of the management and policies of a person or entity, whether through the ownership of voting securities, by contract or otherwise. The term "Subsidiary" as used herein with respect to a party means any partnership, joint venture, corporation of other form of enterprise that is directly or indirectly controlled by such entity or person. For purposes hereof, "control" means the possession, directly or indirectly, of the power to direct or cause the direction of the management and policies of a person or entity, whether through the ownership of voting securities, by contract or otherwise. 2 "Confidential Information" means all information in relation to this Agreement in 1.3. a) b) 2. 2.1. a) b) c) d) e) f) g) "Confidential Information" means all information in relation to this Agreement in whatever form that is disclosed by the Parties to each other and shall include without limitation information disclosed orally or in writing or in any other form, tangible or intangible, and whether furnished prior to, on or after the date of this Agreement, that is described as or provided under circumstances that would reasonably indicate that it is confidential, proprietary or a trade secret, including, but not limited to, information relating to Leclanché's technology, intellectual property, financial or business plans, affairs, methodologies, financial statements or projections, internal management tools and systems, products and product development plans, released or unreleased hardware or software products, sales and marketing plans and materials, clients, contacts and contracts, all files, books, records, documents, specifications, schematics, employee suggestions, papers, drawings, models, sketches of any kind or description, including electronic data recorded or retrieved by any means now in existence or at any time hereinafter developed. Confidential Information shall also include documents transferred to Oak Ridge that are prepared by or on behalf of Leclanché incorporating Confidential Information received from a third party, which is itself required to be treated as confidential. Confidential Information shall not include information or data which was or becomes: generally available to the public, other than as a result of a breach of this undertaking; available to the recipient Party on a non confidential basis from a source other than the disclosing Party or its advisers, provided that such source is not, insofar as the recipient Party is aware, bound by any obligations of confidentiality in respect of such information or data; Market Evaluation - Phase 1 The Parties shall work together to better evaluate the market opportunities in the United States. A joint team shall be constituted, chaired by Anil Srivastava, a Board member of Oak Ridge, to undertake this study which shall be completed by May 31, 2014. The objectives of the study will be to: build a picture
"""

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

assistant: April 6, 2014