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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1.26. VerticalNet-LeadersOnline Clients shall mean the clients of LeadersOnline that utilize the LeadersOnline Services and pay commissions or other fees to LeadersOnline for the use of its Services, and make initial contact with the LeadersOnline Site through a Link from a VerticalNet Site or through direct access to the LeadersOnline Site if such access was prompted by information presented in a Banner, Newsletter Ad or Employer Spotlight containing information about the LeadersOnline Services. 3 1.27. VerticalNet Site shall mean a Site owned and operated by VerticalNet or a portion of such Site designated by VerticalNet. 2. VERTICALNET BRANDED LINK 2.1. Hosting and Maintenance. LeadersOnline shall be responsible for the hosting, display and maintenance of the VerticalNet Branded Link on the LeadersOnline Site. The VerticalNet Branded Link shall be located on the Home Page of the LeadersOnline Site and on the first page of each section of the Site, including the sections entitled "Becoming a Member", "Why You Should Join", "How it Works", "About LeadersOnline" and "Recruiter Information". The VerticalNet Branded Link shall be available on each of the foregoing pages as soon as reasonably practicable after the Effective Date, and throughout the Term. It shall be located in an area of the foregoing pages and in a size mutually agreeable to the Parties. 2.2. Mark License. VerticalNet hereby grants LeadersOnline a non-exclusive, nontransferable, royalty-free right and license for the Term of this Agreement to utilize a VerticalNet Mark in a form approved by VerticalNet for the design and display of the VerticalNet Branded Link. 2.3. Link License. VerticalNet hereby grants to LeadersOnline a non- exclusive, non-transferable, royalty-free right and license to link to the VerticalNet Site. The Link will access the Listing Page of the VerticalNet Site located at www.verticalnet.com. 3. BANNER/NEWSLETTER PURCHASE COMMITMENT. 3.1. Purchase Commitment. During the Term of this Agreement, LeadersOnline agrees to purchase from VerticalNet Banners and Newsletter Ads for a total price of at least *** ($***). All prices for such Banners and Newsletter Ads shall be offered to LeadersOnline at a ***% discount off of VerticalNet's then current prices for similar Banners or Newsletters Ads. All purchases shall be subject to VerticalNet's standard terms and conditions governing advertising on VerticalNet Sites. 3.2. Purchase Requirements. LeadersOnline agrees to purchase at least *** ($***) of such Banners and Newsletter Ads in each calendar quarter after the Source: LEADERSONLINE INC, S-1/A, 4/27/2000 Effective Date (prorated for any partial quarters) until a total of $*** have been purchased, provided, the total dollar amount purchased by LeadersOnline in any calendar quarter shall not consist of greater than ***% (in dollars) of either Banners or Newsletter Ads until a total of $*** has been purchased. 3.3. Advertisement Placement. VerticalNet shall use commercially reasonable efforts to place a Banner purchased in accordance with Section 3.1 [Purchase Commitment] on the HR Site Home Page for a period of 6 months on a rotating, rather than fixed, basis. In addition, as part of the purchase commitment set forth in Section 3.1 [Purchase Commitment], VerticalNet shall provide LeadersOnline up to $*** worth of Banner placements on the Home Page of other VerticalNet Sites of LeadersOnline's choice. All Banner and Newsletter Ad placements shall be in locations mutually agreeable to the Parties, subject to space limitations and other contractual commitments of VerticalNet. ___________ *** Omitted pursuant to a confidential treatment request filed separately filed separately. 4 4. EMPLOYER SPOTLIGHTS 4.1. Development. VerticalNet shall develop, host, display and maintain Employer Spotlights in each of its Online Communities containing information supplied by LeadersOnline. Each Employer Spotlight shall contain a LeadersOnline Mark, text information describing LeadersOnline and a hypertext Link to the LeadersOnline Site. 4.2. LeadersOnline Information. Upon execution of this Agreement, LeadersOnline shall supply VerticalNet with a graphical image in electronic form of its LeadersOnline Mark, a text file containing information describing LeadersOnline and the URL to which the hypertext Link shall be directed. VerticalNet shall use commercially reasonable efforts to launch the Employer Spotlights as soon as practicable after the Effective Date of this Agreement. VerticalNet may, in its sole discretion, reject or edit any text or other materials supplied by LeadersOnline for the creation of the LeadersOnline Employer Spotlights; provided that any edits will be subject to the prior approval of LeadersOnline. The design and appearance of the Employer Spotlights shall be determined by VerticalNet in its sole discretion. 4.3. Information License. LeadersOnline hereby grants VerticalNet a non- exclusive, nontransferable, royalty-free right and license for the Term of this Agreement to use, copy or modify
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Extract the exact clause related to "Ip Ownership Assignment" from the excerpt above.

assistant: Not found.