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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EXHIBIT 10.19 MAINTENANCE AND SUPPORT AGREEMENT This Maintenance and Support Agreement (this "Agreement") is entered on this 9th day of October, 2001 and is deemed effective as of October 1, 2001 (the "Effective Date"), by and between VerticalNet, Inc. ("VNI") and VerticalNet Enterprises LLC, formerly known as Tradeum, Inc. which d/b/a VerticalNet Solutions ("VNE"; collectively with VNI, "Vert"), on the one hand, and Converge, Inc. ("Converge") on the other hand. RECITALS WHEREAS, VNI, VNE and Converge have entered into Amended and Restated Subscription License Agreement effective as of the date hereof (the "Subscription License Agreement") pursuant to which Vert has licensed to Converge certain proprietary software products; and WHEREAS, Converge desires to obtain and VNE is willing to provide certain maintenance and support services with respect to such products on the terms and conditions set forth herein. NOW, THEREFORE, in consideration of the mutual covenants and obligations set forth below, and intending to be legally bound, the parties agree as follows: AGREEMENT 1. Definitions. 1.1 "Affiliate" means, when used with reference to a party, any individual or entity directly or indirectly Controlling, Controlled by or under common Control with such party. 1.2 "Business Day" means a day other than a Saturday, Sunday or federal holiday. 1.3 "Control" (including all derivations thereof) means, with respect to a party, the direct or indirect ownership of at least 50% of the outstanding voting securities of a party, or the right to control the policy decisions of such party. 1.4 "Converge-Requested Enhancement" means any modification, improvement or enhancement to a Product that is developed by VNE at the specific request of Converge as part of the Professional Services provided hereunder. 1.5 "Documentation" means the documentation for the Supported Products that is made generally available by Vert to users or licensees of such Supported Products and, with respect to Supported Products that have been customized for Converge, any supplemental documentation for such Supported Products that is provided by VNE to Converge. 1.6 "Enhancement" means a Vert-General Release Enhancement or a Converge-Requested Enhancement. 1.7 "Error" means a failure of a Supported Product to substantially conform to its corresponding Documentation (or if there is no such Documentation, to its closest reasonable equivalent). 1.8 "Initial Term" is defined in Section 9.1 below. 1.9 "Intellectual Property" shall mean any and all trade secrets, patents, copyrights, trademarks, service marks, trade names, domain names, trade dress, URLs, brand features, know-how and similar rights of any type under the laws of any applicable governmental authority, including, without limitation, all applications and registrations relating to any of the foregoing. 1.10 "Intellectual Property Rights" shall mean all rights in and to Intellectual Property. 1.11 "Maintenance and Support Services" means the services described in Section 2 below. 1.12 "Maintenance Update" means any workaround, bug fix or other software code for a Supported Product that is primarily designed to correct an Error in or other Problem caused by such Supported Product. 1.13 "Object Code" means computer programming code in compiled, machine readable format, running, to the extent requested under a Work Plan or SOW, on each of Unix (at least Tru64 and HP-UX) and Windows NT (or their successor operating systems), together with all related end-user or installation manuals and other similar documentation. 1.14 "Party" or "party" means Vert, VNI and/or VNE, as applicable, on the one hand, and Converge on the other hand. 1.15 "Personnel" means agents, employees, independent contractors, temporary employees or subcontractors engaged or appointed by Converge, VNI or VNE, respectively. 1.16 "Problem" means a Severity Level 1, 2, 3 or 4 problem with a Supported Product (whether or not attributable or believed to be attributable to an Error), as such problems are described in greater detail in Exhibit A hereto. 1.17 "Problem Report" means a report by Converge of a Problem with respect to a Supported Product, which report indicates the Problem and identifies its Severity Level. 1.18 "Professional Services" means services performed or to be performed by VNE hereunder with respect to the development of Converge-Requested Enhancements, the implementation of or migration to new Products or Enhancements, customer installations of the Products, training with respect to use or operation of the Products or any Enhancements (including training designed to enable Converge to provide Level 1 support for the Supported Products), consulting services with respect to the Products or their hardware or other application and system software environments, or any other services described in Section 3 below. 2 1.19 "Quarterly Allocation" means the quarterly allocation of Services being made available to Converge
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Extract the exact clause related to "Parties" from the excerpt above.

assistant: VerticalNet Enterprises LLC