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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Time, by making any legal filings in each relevant jurisdiction necessary to effect such change worldwide. 4.2.3 UTC, on behalf of itself and the other members of the UTC Group, hereby grants to Otis, Carrier and the other members of the Otis Group and the Carrier Group a limited, non-exclusive, non-transferable, personal and nonsublicensable right to continue temporarily to use, following the Effective Time, any United Technologies Trademark it is using immediately prior to the Effective Time, solely to the extent of such pre- Separation use and in accordance with product quality standards and programs in place at the respective member of the Otis Group or the Carrier Group immediately prior to the Effective Time, and strictly in accordance with this Section 4.2.3; provided that Otis and Carrier shall, and shall cause each of its respective Affiliates (including, after the Effective Time, the members of, respectively, the Otis Group and the Carrier Group) (a) not to hold itself out as having any affiliation with UTC or any member of the UTC Group (except to the extent a third party may infer such affiliation merely due to the limited use of the United Technologies Trademarks as contemplated herein), and (b) to use diligent efforts to eliminate use of the United Technologies Trademarks. In any event, as soon as practicable after the Effective Time, and in any event within three (3) years thereafter, Otis and 11 Carrier shall, and shall cause each of its respective Affiliates (including, after the Effective Time, the members of, respectively, the Otis Group and the Carrier Group), and any of its licensees or its respective Affiliates' licensees, to (a) cease and discontinue use of all United Technologies Trademarks, and (b) complete the removal of the United Technologies Trademarks from all of their respective products, signage, vehicles, properties, technical information, stationery and promotional or other marketing materials and other assets of Otis, Carrier and the other members of the Otis Group and the Carrier Group. Except for the limited, temporary license granted in this Section 4.2.3, neither UTC nor any other member of the UTC Group grants any right or license hereunder, express or implied, to use any United Technologies Trademarks. 4.3 Special Trademark Provisions. Special provisions concerning Trademarks are provided in Schedule 4.3. ARTICLE V EXCLUDED AGREEMENTS 5.1 No Change to Excluded Agreements. The Parties do not intend by this Agreement to amend or otherwise change the Intellectual Property Rights or other provisions of any Excluded Agreement. Intellectual Property Rights provided, received or created pursuant to an Excluded Agreement will not constitute Licensed Intellectual Property Rights, and, with respect to the applicable parties thereto, will continue to be subject to any licenses, permissions or restrictions granted or imposed in the respective Excluded Agreement in accordance with its terms. ARTICLE VI CONFIDENTIALITY 6.1 Received Information and Materials. The Parties acknowledge that members of each Party Group currently are in possession of information and materials f members of the other two Party Groups, which may include designs, drawings, specifications, technical data and other data, databases, formulae, algorithms and mathematical embodiments, plans, software, proposals, processes, procedures, manufacturing techniques, and business methods, and some of which may be included in the Licensed Intellectual Property Rights. With respect to a receiving Party, such information will be referred to individually or collectively as "Received Information and Materials," provided that Received Information and Materials will not include information disclosed under any Excluded Agreement. 6.2 Confidential Information. All Received Information and Materials that are identified as or are of the type generally considered as confidential or proprietary or that have historically been subject to reasonable confidentiality and proprietary protections, and any communications or information provided after the Effective Time pursuant to this Agreement among members of the different Party Groups, will be deemed confidential and proprietary information of the Person that provided it, unless the information (a) is or becomes generally available to the public other than as a result of a disclosure in breach of this Agreement; (b) is rightfully available to or known by the receiving Party prior to receipt by the receiving Party 12 without any obligation of confidentiality; (c) is received by the receiving Party from a third party, provided that the third party is not known by the receiving Party, after reasonable inquiry, to be in breach of any obligation of confidentiality; or (d) was independently developed by the receiving Party, without violating any contractual or legal obligation ("Confidential Information"). 6.3 Obligations. With respect to Confidential Information in its possession,
"""

Extract the exact clause related to "Source Code Escrow" from the excerpt above.

assistant: Not found.