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:
"""
EXHIBIT 10.1 ELECTRONIC JOURNAL SOFT WARE DEVELOPMENT, HOSTING AND MANAGEMENT AGREEMENT This AGREEMENT is made the 20 March day of 1998 BETWEEN 1. HealthGate Data Corp., a Delaware corporation ("HealthGate"), having an address at 380 Pleasant Street, Malden, Massachusetts, 02148, USA AND 2. Blackwell Science Limited a company registered in England ("Blackwell"), whose registered office is Osney Mead, Oxford OX2 OEL, England, and Munksgaard A/S, a company registered in Denmark ("Munksgaard"), having an address at 35 Norre Sogade, Copenhagen DK-1016, Denmark (together, Blackwell and Munksgaard shall be referred to as "the Publishers") WHEREAS: A. Blackwell and Munksgaard, among other business activities, publish journals; B. HealthGate, among other business activities, creates, compiles and distributes health and biomedical information through the Internet; C. The Publishers desire to retain HealthGate to provide electronic journal management services, including development of an on-line web site for its journals, and other mutually agreed publications. D. HealthGate will provide the Services. E. HealthGate shall license to the Publishers the Proprietary Software and provide appropriate operational documentation if the Publishers decide to manage their own service from 28 February 2000. NOW THEREFORE IT IS HEREBY AGREED AS FOLLOWS: 1. Definitions In this Agreement, the following words and expressions shall have the following meanings: "Acceptance" or "Accepted" Means acceptance of any part or the whole of the System by the Publishers when the System has successfully passed the acceptance tests in accordance with Clause 9 below but for the avoidance of doubt does not refer to the continuing Services after the Site goes live "Agreement" means this document and its Schedules and any documents expressly incorporated herein by reference and shall include any amendments subsequently agreed. "Content" means up to 200 Journals and any other material related to the Journals which the Publishers include in printed or electronic form, or any part thereof the "Development Timetable" means the timetable upon which the Development Work is proposed to take place which is in the implementation plan the "Development Work" means the development work required to produce the System (but excluding the ongoing services after the Site goes live) based upon the Specification and technical documentation sufficient for the system to be developed and extended including but not limited to any deviations from the original specification agreed to be necessary during the development. "Escrow Agreement" means the agreement(s) between the Publishers, the escrow agent and HealthGate the terms of which are specified in the Fourth Schedule the "Hardware" means the equipment and hardware referred to in Clause 8, as upgraded from time to time, and including extra hardware as a contingency. "Journal" means a Journal which the Publishers intend to include on the Site the "Licence" means the Licence granted in Clause 10 the "Proprietary Software" means HealthGate's own software which has been or will be developed 2 the "Services" the services to be performed by HealthGate to be set out in the Specification, to include but not limited to (i) any ongoing work in the design and development of the Site; (ii) mounting the Content on HealthGate's Hardware; (iii) hosting and making the Content and portions thereof accessible in an online interactive mode for searching, access, review, displaying in a web browser or on computer terminals, downloading, and printing on paper and; (iv) providing access to Publishers' subscribers and other third parties to the Site through telecommunications access via the Internet. the "Site" means the world wide web site to be prepared for the Publishers comprising all pages including graphics, audio-visual effects, software and all the material in compliance with the Specification and all parts of the System used for the Site the "Software" means the Proprietary Software and the Third Party Software including any source code and operator manuals relating thereto, to be developed or used and/or licensed by HealthGate in accordance with this Agreement the "Specification" means the detailed user scenarios and implementation plan prepared by HealthGate and approved by the Publishers and annexed in the First Schedule the "System" means the system comprising the hardware, software, services and peripherals specified in the Specification and including the Software all as the same is to be supplied by HealthGate to suit the Publishers' requirements "System Completion Date" means 14 December 1998 "Third Party Software" means all software to be included in the System owned by a third party, which shall be licensed for use and/or distribution by HealthGate as part of the System, and by the Publishers and/or third parties if the Services cease to be provided by HealthGate.
"""

Extract the exact clause related to "Agreement Date" from the excerpt above.

assistant: 20 March day of 1998