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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Agreement or terminate this Agreement according to the extent of the effect on the performance hereof. Article 12 Dispute Resolution 12.1 Any disputes between the Parties arising from the performance of this Agreement shall be resolved through amicable negotiations; in case such negotiations fail, both Parties agree to submit the dispute to the competent court where Party A is domiciled. 12.2 In case of disputes between the Parties over certain provisions hereof, or when any such dispute is pending for resolution, the Parties shall continue to implement the other provisions hereof except the disputed provisions. Article 13 Effectiveness, Amendment and Termination of Agreement 13.1 This Agreement shall come into force as of January 1, 2013 and remain valid for 1 year. As of the effective date hereof, the original cooperation of mobile game business executed between the Parties shall terminate automatically. Upon the expiry of this Agreement, this Agreement may be renewed automatically for one year (but can only be renewed once) if neither Party raises objection. Except otherwise agreed between the parties, the contents of this Agreement shall remain binding throughout the renewed period. Page 21 of 29 Jiangsu Telecom Contract No.: JSXCS1200166CC000 13.2 Throughout the effective term and renewed term hereof, this Agreement may be revised or amended upon mutual consent. The Parties may execute a supplemental agreement or execute a new agreement to reflect such revision or amendment. 13.3 Any business rules, management measures, quality standards and/or customer service standards formulated by Party A during the term hereof shall be part of this Agreement, and if such rules, measures and/or standards conflict with the terms hereof, such rules, measures and/or standards shall prevail, unless the Parties deem it appropriate to apply this Agreement or deem it necessary to execute a separate agreement for such conflicts. 13.4 Any Party who wishes to amend or revise this Agreement must provide a 30-day prior written notice to the other Party, and the Parties shall negotiate to amend or revise this Agreement in writing. 13.5 During the term hereof, Party A may, depending on the business development and needs of management, evaluate and sort out Party B and its business according to unified rules. If Party B fails to reach the requirements in Party A's evaluation, sorting or other business management measures, Party A may terminate this Agreement. 13.6 Throughout the performance of this Agreement, except otherwise expressly provided herein, neither Party may suspend or terminate the performance of this Agreement or unilaterally terminate this Agreement without the consent of the other Party. 13.7 Any Party's failure to perform its obligations or duties hereunder, or serious violation of the provisions hereof, which has made the other Party unable to operate or normally conduct business cooperation hereunder, shall be deemed that such Party has unilaterally terminated this Agreement. The non-breaching Party shall have the right to claim compensation from the breaching Party for any economic loss incurred by its breach, and terminate this Agreement. 13.8 This Agreement shall automatically terminate if Party B: (1) transfers or leases the numbers, trunk line, digital web address and such other resources acquired from Party A without approval ofParty A; (2) runs its business beyond the business operation area and business scope provided by its qualification permit; (3) has no qualification permit issued by the State competent authority but provides the content and category of the business that needssuch qualification permit; (4) provides fake copyright or qualification; (5) fails to pass the assessment of "survival of the fittest" organized by Party A, in which case this Agreement shall be automatically terminated. If Party B's receivable information fee of accumulatively 3 months is zero, this Agreement shall be automatically terminated (except the free games); Page 22 of 29 Jiangsu Telecom Contract No.: JSXCS1200166CC000 (6) disobeys Party A's business management or hurts Party A's interests; (7) otherwise disobeys the requirements of relevant authority or Party A's management. 13.9 During the term hereof, any division, merger, dissolution, liquidation, bankruptcy or other events that lead to changes of Party B in the company nature, qualification and capacity for civil acts shall be notified to Party A in time, and subject to the provisions hereunder about the exit grace period. If Party B is deprived of the qualification or capacity to provide the wireless value added business hereunder due to its dissolution, liquidation or bankruptcy, this Agreement shall terminate accordingly. In case of division or merger of Party B, this Agreement shall terminate, and the successor company (or other entity) to
"""

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

assistant: This Agreement shall come into force as of January 1, 2013 and remain valid for 1 year.