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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pulp products through exchanges, auctions, or reverse auctions or any other e-commerce medium, (b) paper (other than finished paper-based products, including, but not limited to, books, stamps and labels) and copy paper (i) through exchanges, auctions or reverse auctions or (ii) in quantities greater than one ton through any e-commerce medium, (c) raw materials used to make paper packaging, including, but not limited to, linerboard, medium, other containerboard grades and corrugated sheet through exchanges, auctions, reverse auctions or any other e-commerce medium, or (d) paper rolls and reels weighing more than 50 pounds used by printers through exchanges, auctions, reverse auctions or any other e-commerce medium; provided, however, that this Section 5.8.1 [Non-Competition] shall not apply to advertisements, Storefronts or similar features on VerticalNet's Sites. 5.8.2. During the Term, VerticalNet will not, directly or indirectly, design, host, operate, maintain or otherwise participate in a co-branded career center or a co-branded equipment listing Site with a PaperExchange Competitor or license a VerticalNet Link for use or display on any PaperExchange Competitor's Site. Source: PAPEREXCHANGE COM INC, S-1/A, 3/22/2000 5.8.3. During the Term, PaperExchange will not, directly or indirectly, design, host, operate, maintain or otherwise participate in a co-branded career center or a co-branded equipment listing Site with a Pulp and Paper Online Competitor or license a PaperExchange Link for use or display on any Pulp and Paper Online Competitor's Site. 5.9. Exchange. 5.9.1. PaperExchange shall provide to VerticalNet an ID and a password that will allow VerticalNet to access the "Exchange" portion of the PaperExchange Site. PaperExchange shall provide reasonable training to VerticalNet with respect to the creation, operation and marketing of such an exchange. 5.9.2. PaperExchange will place a VerticalNet Link in a mutually agreeable location and size on the "Exchange" portion of the PaperExchange Site. 5.10. Allocation of Resources. During the Term, each of PaperExchange and VerticalNet agrees to dedicate reasonable financial, marketing and staffing resources in order to actively promote the activities contemplated by this Agreement and will use reasonable efforts to maintain the strategic alliance described in this Agreement (and its focus on the pulp, paper and packaging industry generally) as a high priority. 6. INTELLECTUAL PROPERTY 6.1. Except as set forth in Sections 4.3.1 [Non-Competition] and 5.8 [Non-Competition], nothing in this Agreement shall be construed as preventing VerticalNet from implementing VerticalNet Links on any other Site. 6.2. Except as set forth in Sections 4.3 [Non-Competition] or 5.8.3 [Non-Competition], nothing in this Agreement shall be construed as preventing PaperExchange from implementing PaperExchange Links on any other Site. 9 6.3. VerticalNet hereby grants to PaperExchange a non-exclusive, non-transferable, royalty-free, right and license to link to Pulp and Paper Online through a VerticalNet Link. VerticalNet shall furnish PaperExchange with a full color representation of each VerticalNet Link at least two days prior to its scheduled placement on a page of the PaperExchange Site. If VerticalNet subsequently modifies any VerticalNet Link or the URL associated with such VerticalNet Link, it shall furnish a representation of same to PaperExchange, which PaperExchange shall substitute for the prior version within two days after receipt thereof. VerticalNet shall have final approval over all VerticalNet Links on the PaperExchange Site. 6.4. PaperExchange hereby grants VerticalNet a non-exclusive, non-transferable, royalty-free, right and license to link to the PaperExchange Site through a PaperExchange Link. PaperExchange shall furnish VerticalNet with a full color representation of each PaperExchange Link at least two days prior to its scheduled placement on Pulp and Paper Online. If PaperExchange subsequently modifies any PaperExchange Link or the URL associated with such PaperExchange Link, it shall furnish a representation of same to VerticalNet, which VerticalNet shall substitute for the prior version within two days after receipt thereof. PaperExchange shall have final approval over all PaperExchange Links on Pulp and Paper Online. 6.5. Except for the express rights granted to PaperExchange under this Agreement, PaperExchange acknowledges and agrees that the Intellectual Property of VerticalNet is and shall remain the sole property of VerticalNet and nothing in this Agreement shall confer in PaperExchange any right of ownership or license rights in VerticalNet's Intellectual Property. In addition, PaperExchange shall not now or in the future contest the validity of VerticalNet's Intellectual Property. 6.6. Except for the express rights granted to VerticalNet under this Agreement, VerticalNet acknowledges and agrees that the Intellectual Property of PaperExchange is and shall remain the sole property of PaperExchange and nothing in this Agreement shall confer in VerticalNet any right of ownership or license rights in PaperExchange's Intellectual Property. In addition, VerticalNet shall not
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Extract the exact clause related to "Parties" from the excerpt above.