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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Intellectual Property of Party A. If any third party infringes any right of Intellectual Property, Party B shall notify Party A immediately in written of such infringements within the scope that it knows, and only Party A has the right to take actions against such infringements. 3.3 Party B agrees to use the Intellectual Property only pursuant to this Agreement and not to use the Intellectual Property by manner of deceit, misleading or others manners that are deemed by Party A as harmful to the Intellectual Property or the reputation of Party A. 4. Confidentiality 4.1 Party B shall protect and maintain the confidentiality of any and all confidential data and information acknowledged or received by Party B from Party A (collectively the "Confidential Information"). Upon termination of this Agreement, Party B shall return Confidential Information to Party A or destroy it itself and delete Confidential Information from any electronic devices and cease to use them as required by Party A. Party B shall not disclose, grant or transfer any Confidential Information to any third party and will not use the Confidential Information without Party A's written consent. 4.2 Both Parties agree that the Article 4 shall survive whatever this agreement is amended, rescinded or terminated. 5. Representations and Warranties 5.1 Party A represents and warrants as follows: Intellectual Property Agreement 2 5.1.1 Party A is a wholly foreign-owned enterprise duly incorporated and validly existing under the laws of the PRC. 5.1.2 Party A, subject to its company power and business scope, has taken necessary company actions to get the proper authorization and the consents or approvals (if necessary) from other third party or governments, without breaching any restricts of the laws and company that binds or affects Party A to execute and perform this Agreement. 5.1.3 The Agreement will constitute a legal, valid and binding agreement of Party A and will be enforceable against Party A in accordance with its terms upon its execution. 5.1.4 Party A owned copyright or license of the Intellectual Property. 5.2 Party B represents and warrants as follows: 5.2.1 Party B is a company duly registered and validly existing under the laws of the PRC and is licensed by relevant government authorities to engage in the internet information service value-added telecommunication service. 5.2.2 Party B, subject to its company power and business scope, has taken necessary company actions to get the proper authorization and the consents or approvals (if necessary) from other third party or governments, without breaching any restricts of the laws and company that binds or affects Party B to execute and perform this Agreement. 5.2.3 The Agreement will constitute a legal, valid and binding agreement of Party B and will be enforceable against Party B in accordance with its terms upon its execution. 6. Effective Date and Term 6.1 This Agreement has been duly executed as of the date first set forth above and shall be effective simultaneously. The term of this Agreement is five (5) years unless the early termination in accordance with this Agreement. However, Party A and Party B shall review this Agreement every six (6) months to determine whether any amendment or supplement to the Agreement is necessary by considering the circumstances after the executing of this Agreement. 6.2 This Agreement may be extended by both Parties in writing upon the expiration of this Agreement. The term of extension will be decided by the consultation of both Parties. 7. Termination 7.1 Early Termination Without prejudice to any legal or other rights or remedies of the party who asks for termination of this Agreement, any Party has the right to terminate this Agreement immediately with written notice to the other party in the event the other party materially breaches this Agreement including but not limited to the obligation under Article 3 of this Agreement and fails to cure its breach within thirty (30) days from the date it receives written notice of its breach from the non-breaching party. During the term of this Agreement, Party A may terminate this Agreement at any time with a written notice to Party B 30 days before such termination. Intellectual Property Agreement 3 7.2 Effect of Termination or Expiration Upon and after the expiration or termination of this Agreement, Party B shall not have all rights granted pursuant to this Agreement and will refrain from further direct or indirect use of the Intellectual Property. 8. Force Majeure 8.1 Force Majeure, which includes but not limited to acts of governments, acts of nature,
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Extract the exact clause related to "Covenant Not To Sue" from the excerpt above.

assistant: Not found.