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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application and is hereby expressly waived by each Party, and any controversy over interpretations of this Agreement shall be decided without regards to events of drafting or preparation. (k) Entire Agreement. This Agreement contains the entire understanding of the Parties with respect to the subject matter hereof. (l) Notices. Any notices, consents, determinations, waivers or other communications required or permitted to be given under the terms of this Agreement must be in writing and will be deemed to have been delivered: (i) upon receipt, when delivered personally; (ii) upon receipt, when sent by e-mail to the e-mail address for a Party set forth below; and (iii) one (1) business day after deposit with a nationally recognized overnight delivery service, in each case properly addressed to the Party to receive the same. The addresses for such communications shall be: Exhibit 10.1 If to the Company or the Board: Spôk Holdings, Inc. 6850 Versar Center, Suite 420 Springfield, Virginia 22151-4148 Attention: Vince Kelly Email: vince.kelly@spok.com with a copy (which shall not constitute notice) to: Latham & Watkins LLP 555 Eleventh Street, NW Suite 1000 Washington, D.C. 20004 Attention: William O'Neill and Christopher Drewry E-mail: William.O'Neill@retiredpartner.lw.com and Christopher.Drewry@lw.com If to the White Hat Parties: White Hat Capital Partners LP 150 East 52nd Street 21st Floor New York, NY 10022 Attention: David Chanley and Mark Quinlan Email: DChanley@whitehatcp.com and MQuinlan@whitehatcp.com with a copy (which shall not constitute notice) to: Olshan Frome Wolosky LLP 1325 Avenue of the Americas New York, NY 10019 Attention: Elizabeth Gonzalez-Sussman E-mail: egonzalez@olshanlaw.com (m) Termination. Unless earlier terminated as provided in this Agreement, upon the expiration of the Support Period in accordance with Section 4, this Agreement shall immediately and automatically terminate in its entirety and no Party shall have any further rights or obligations under this Agreement; provided, however, no Party shall be released from any breach of this Agreement that occurred prior to the termination of this Agreement. Exhibit 10.1 IN WITNESS WHEREOF, each of the parties hereto has executed this Agreement, or caused the same to be executed by its duly authorized representative as of the date first above written. Spōk Holdings, Inc. By: /s/ Vincent D. Kelly Name: Vincent D. Kelly Title: President and Chief Executive Officer Exhibit 10.1 White Hat Strategic Partners LP By: White Hat SP GP LLC, its General Partner By: /s/ Mark Quinlan Name: Mark Quinlan Title: Managing Member White Hat SP GP LLC By: /s/ Mark Quinlan Name: Mark Quinlan Title: Managing Member White Hat Capital Partners LP By: /s/ Mark Quinlan Name: Mark Quinlan Title: Managing Partner White Hat Capital Partners LP By: /s/ Mark Quinlan Name: Mark Quinlan Title: Managing Member
"""

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