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:
"""
party. A notice given by email shall be deemed to take effect one hour after it is sent, a notice sent by first class post shall be deemed to take effect on the next working day and notice sent by courier upon delivery at the address in question. A notice required to be given to the Company under this Agreement shall not be validly given if sent by email. 24.5 This Agreement and any document referred to in it constitutes the entire agreement between the parties and supersedes and extinguishes all previous discussions, correspondence, negotiations, drafts, agreements, promises, assurances, warranties, representations and understandings between them, whether written or oral, relating to its subject matter. 24.6 The Executive agrees that in entering into this Agreement the Executive does not rely on and shall have no remedies in respect of, any statement, representation, assurance or warranty (whether made innocently or negligently) that is not expressly set out in this 12 Agreement. The Executive waives any claim for innocent or negligent misrepresentation or negligent misstatement including in respect of any statement set out in this Agreement. 24.7 No variation or agreed termination of this Agreement shall be effective unless it is in writing and signed by the parties (or their authorised representatives). If the Executive commences employment or continues in employment without executing a copy of this Agreement and fails to object within one month of the Commencement Date then the Executive will be deemed to have agreed to its terms. 24.8 The Executive shall not be contractually entitled to receive any benefit from the Company which is not expressly provided for by this Agreement. 24.9 This Agreement may be executed in any number of counterparts, each of which, when executed and delivered, shall be an original, and all the counterparts together shall constitute one and the same agreement. 24.10 The Contracts (Rights of Third Parties) Act 1999 shall only apply to this Agreement in relation to any Group Company. No person other than the parties to this Agreement and any Group Company shall have any rights under it and it will not be enforceable by any person other than those parties. 24.11 This Agreement and any dispute or claim arising out of or in connection with it or its subject matter or formation (including non-contractual disputes or claims) shall be governed by and construed in accordance with the law of England. 24.12 Each party irrevocably agrees that the courts of England shall have exclusive jurisdiction to settle any dispute or claim arising out of or in connection with this Agreement or its subject matter or formation (including non-contractual disputes or claims). 13 Signed by Rick E Winningham for and on behalf of Theravance Biopharma UK Limited /s/ Rick E Winningham Signature Signed as a deed by Brett Haumann in the presence of: /s/ Brett Haumann Signature /s/ Connor Haumann Witness's Signature Name of witness Connor Haumann Address of witness [address removed] Occupation of witness Student 14
"""

Extract the exact clause related to "Parties" from the excerpt above.

assistant: Theravance Biopharma UK Limited