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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failure to obtain the approval or any government, governmental agency, commission, board or other tribunal having jurisdiction, and any other event not reasonably within the control of Dolphin; 2.Any notice, demand, payment or other communication (collectively the "Correspondence") to be given hereunder shall be in writing and shall be delivered to the address or fax number of the party appearing herein; 3.Both parties shall do all such things and execute all such written materials as may be required to carry out the full intent and meaning of this Agreement; and 4.This is the entire Agreement between the parties in respect of the matter referred to herein and no amendment or interpretation of this Agreement will be binding on the parties unless same is in writing executed by the parties hereto. 5.Dolphin shall permit any duly authorized representative of DGT, during normal business hours and at DGT's sole risk and expense, to enter upon and into any premises of Dolphin for the purpose of inspecting the service. 6.Nothing contained herein shall be deemed or construed to create between the parties hereto a partnership or joint venture. No party shall have the authority to act on behalf of any other party, or to commit any other party in any manner or cause whatsoever or to use any other party's name in any way not specifically authorized by this Agreement. No party shall be liable for any act, omission, representation, obligation or debt of any other party, even if informed of such act, omission, representation, obligation or debt. 7.Subject to the limitations hereinbefore expressed, this Agreement shall enure to the benefit of and be binding upon the parties and their respective successors and permitted assigns. 8.No condoning, excusing or overlooking by any party of any default, breach or non-observance by any other party at any time or times in respect of any covenants, provisos or conditions of this Agreement shall operate as a waiver of such party's rights under this Agreement in respect of any continuing or subsequent default, breach or non-observance, so as to defeat in any way the rights of such party in respect of any such continuing or subsequent default or breach, and no waiver shall be inferred from or implied by anything done or omitted by such party, save only an express waiver in writing. 9.No exercise of a specific right or remedy by any party precludes it from or prejudices it in exercising another right or pursuing another remedy or maintaining an action to which it may otherwise be entitled either at law or in equity. Page 4 of 5 10.Marginal headings as used in this Agreement are for the convenience of reference only and do not form a part of this Agreement and are not be used in the interpretation hereof. 11.If any Article, part, section, clause, paragraph or subparagraph of this Agreement shall be held to be indefinite, invalid, illegal or otherwise voidable or unenforceable, the entire Agreement shall not fail on account thereof, and the balance of this Agreement shall continue in full force and effect. 12.Time shall be of the essence of this Agreement. 13.Whenever the singular or masculine or neuter is used throughout this Agreement the same shall be construed as meaning the plural or feminine or body corporate when the context or the parties hereto may require. IN WITNESS WHEREOF the parties hereto have hereunto executed this Agreement on the 1st day of JUNE , 2006 , but effective as of the Date of Commencement. SIGNED FOR AND ON BEHALF of DGT CORP. ) by its duly authorized officers: ) ) ) /s/ Norman Joe, President ) Authorized Signatory ) ) SIGNED FOR AND ON BEHALF of DOLPHIN INDUSTRIES LIMITED ) ) by its duly authorized officers: ) ) ) /s/ Chung-Keung Ho, President/Director ) Authorized Signatory )
"""

Extract the exact clause related to "Covenant Not To Sue" from the excerpt above.

assistant: Not found.