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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nor claim for itself or its affiliated entities, independent contractors, or employees, either expressly or impliedly, any rights, title, interest, or licenses to such rights and each assigns to Skype, with full title guarantee, all copyrights, patents, trade marks, service marks, rights of publicity, authors' rights, contract and licensing rights, goodwill and all other intellectual property rights in and to the same as may exist now and/or hereafter come into existence and arising under the laws of any jurisdiction for the entire term of such rights and all renewals, revivals and extensions thereof. 13 Source: TOM ONLINE INC, 20-F, 5/1/2006 4.2.3.2.2. if such rights comprise any data specifically provided to the Group by Customers during the billing process ("Billing Data"), then such rights shall be owned exclusively by the Online Group and neither Skype nor the Company will grant, nor claim for itself or its affiliated entities, independent contractors, or employees, either expressly or impliedly, any rights, title, interest, or licenses to such rights and each assigns to Online BVI, with full title guarantee, all copyrights, patents, trade marks, service marks, rights of publicity, authors' rights, contract and licensing rights, goodwill and all other intellectual property rights in and to the same as may exist now and/or hereafter come into existence and arising under the laws of any jurisdiction for the entire term of such rights and all renewals, revivals and extensions thereof. 4.2.3.2.3. if such rights comprise (i) analysis prepared for or on behalf of the Parties as participants in the Company-Skype Branded Application, or (ii) any intellectual property right co-developed by the Parties, or (iii) of any Support Information, or (iv) any data as specifically provided to Skype or the Online Group by Company-Skype Branded Customers ("Joint Data"), other than that set forth in Sections 4.2.3.2.1 and 4.2.3.2.2 above and other than any Group Rights or Skype Rights, then such rights shall be jointly owned by the Parties, and may be exploited by any Party in accordance with this Agreement, and outside of this Agreement to the extent such exploitation would not, (x) in the case of Online BVI, violate or infringe upon the Skype Rights, (y) in the case of Skype, violate or infringe upon the Group Rights, or (z) in the case of the Company, violate or infringe upon the Group Rights or the Skype Rights. 4.2.3.2.4. Notwithstanding the foregoing, the Company may use the Skype API for the sole purpose of developing applications that connect with the Company-Skype Branded Application ("Add-On Applications"), and provided that such use is at all times in compliance with the terms of the API provisions of the EULA as released by Skype from time to time, such Add-On Applications shall be owned by the Company as set forth in the EULA. 5. PAYMENTS AND REPORTING 5.1 Other Revenue. The Company-Skype Branded Application will permit Company-Skype Branded Customers to access basic features at no charge to the Company-Skype Branded Customers. It is hereby acknowledged and agreed that the rights granted by the Online Group hereunder are not exclusive (save as provided herein) and the Online Group will offer its own products and services through various channels and may receive subscription and other fees ("Separate Fees") for such services ("Separate Services"), other than and not in any manner relating to the Company-Skype Branded Application, the Company-Skype Toolbar, the Company-Skype Branded Web Site or the Company-Skype Branded Content, offered by the Online Group from time to time and accessible separate from, and entirely independent of, the Company-Skype Branded Application, the Company-Skype Toolbar, Company-Skype Branded Web Site and/or the Company-Skype Branded Content. No portion of the Separate Fees shall be payable to or shared in by Skype or the Group. Notwithstanding the foregoing, if approved in writing by Skype, which approval may be withheld in its sole discretion, the Online Group may (i) charge any additional or separate fees to access the Company-Skype Branded Web Site, Company-Skype Branded Content, Company-Skype Branded Application or Company-Skype Toolbar, or (ii) offer any Separate Services or charge any Separate Fees by or through the Company-Skype Branded Web Site, Company-Skype Branded Content, Company-Skype Branded Application or Company-Skype Toolbar. It is hereby acknowledged and agreed that the rights granted by Skype hereunder are not exclusive (save as provided herein) and Skype will offer its own products and services, other than and not in any manner relating to the Company- Skype Branded Application, Company-Skype Toolbar, Company-Skype Branded Web Site or Company-Skype Branded Content, through various channels accessible separate from, and entirely
"""

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

assistant: Not found.