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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performance or oversight of any of the development activities hereunder to terminate his or her employment and accept employment or work as a consultant with the soliciting Party. Notwithstanding the foregoing, nothing herein shall restrict or preclude the Parties' right to make generalized searches for employees by way of a general solicitation for employment placed in a trade journal, newspaper or website. 15.17 Amendments; No Waiver. Unless otherwise specified herein, no amendment, supplement, or modification of this Agreement will be binding on either Party unless it is in writing and signed by both Parties. No delay or failure on the part of a Party in the exercise of any right under this Agreement or available at law or equity will be construed as a waiver of such right, nor will any single or partial exercise thereof preclude any other exercise thereof. All waivers must be in writing and signed by the Party against whom the waiver is to be effective. Any such waiver will constitute a waiver only with respect to the specific matter described in such writing and will in no way impair the rights of the Party granting such waiver in any other respect or at any other time. 15.18 Severability. If any provision (or portion thereof) of this Agreement is determined by a court or arbitration to be unenforceable as drafted by virtue of the scope, duration, extent, or character of any obligation contained herein, it is the Parties' intention that such provision (or portion thereof) will be construed in a manner designed to effectuate the purposes of such provision to the maximum extent enforceable under such Applicable Law. The Parties will enter into whatever amendment to this Agreement as may be necessary to effectuate such purposes. 15.19 Entire Agreement. This Agreement, including all Exhibits hereto and the Disclosure Letter, contains the entire understanding of the Parties and supersedes, revokes, terminates, and cancels any and all other arrangements, understandings, agreements, term sheets, Source: PHASEBIO PHARMACEUTICALS INC, 10-K, 3/30/2020 or representations and warranties, whether oral or written, between the Parties relating to the subject matter of this Agreement. 15.20 Counterparts. This Agreement will be executed in two (2) counterparts, one (1) for either Party, which, taken together, will constitute one and the same agreement. This Agreement will not be binding on the Parties or otherwise effective unless and until executed by both Parties. 15.21 Construction. This Agreement has been negotiated by the Parties and their respective counsel. This Agreement will not be construed in favor of or against either Party by reason of the authorship of any provisions hereof. [Signature Page Follows] Source: PHASEBIO PHARMACEUTICALS INC, 10-K, 3/30/2020 IN WITNESS WHEREOF, the Parties, intending to be legally bound hereby, have caused this Agreement to be executed in duplicate by their duly authorized representatives as of the Effective Date. PHASEBIO PHARMACEUTICALS, INC. By: /s/ Jonathan Mow Name: Jonathan Mow Title: CEO Date: January 9, 2020 SIGNATURE PAGE TO THE CO-DEVELOPMENT AGREEMENT Source: PHASEBIO PHARMACEUTICALS INC, 10-K, 3/30/2020 IN WITNESS WHEREOF, the Parties, intending to be legally bound hereby, have caused this Agreement to be executed in duplicate by their duly authorized representatives as of the Effective Date. SFJ PHARMACEUTICALS X, LTD. By: /s/ Robert DeBenedetto Name: Robert DeBenedetto Title: Director Date: January 9, 2020 SIGNATURE PAGE TO THE CO-DEVELOPMENT AGREEMENT Source: PHASEBIO PHARMACEUTICALS INC, 10-K, 3/30/2020 EXHIBIT LIST Exhibit A The Product Exhibit B Current Approved CROs Exhibit C Current Approved Vendors Exhibit D Development Plan Exhibit E Executive Officers Exhibit F‑1 PB Anti-Bribery and Anti-Corruption Practices Exhibit F‑2 SFJ Anti-Bribery and Anti-Corruption Practices Exhibit G SFJ European Operational Support Exhibit H Warrant Exhibit I Timeline Exhibit J Manufacturer Exhibit K Trial Data Package Purchase Agreement Exhibit L AZ License Exhibit M Amendment to AZ License Exhibit N MedImmune Pharmacovigilance Agreement Exhibit O Program Transfer Agreement Exhibit P Terms of SVB Subordination Agreement Source: PHASEBIO PHARMACEUTICALS INC, 10-K, 3/30/2020
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Extract the exact clause related to "Document Name" from the excerpt above.

assistant: CO-DEVELOPMENT AGREEMENT