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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way of clarification, Accuray's sole obligation shall be to make such Bug Fixes available to Customer, and Accuray shall have no obligation (unless otherwise agreed by the Customer and Accuray) for installation or implementation of such Bug Fixes at the Customer's site. "Bug Fix" means an error correction or minor change in the existing software and/or hardware configuration that is required in order to enable the existing software and/or hardware configuration to perform to the existing functional specification(s). 4.6.4. Safety Updates. Notwithstanding Section 4.6.2 and any obligations according to law, for a period of 10 years following Installation of a System, Accuray will provide to Customer, without charge, Safety Updates with respect to any hardware or software included in the System. This is Accuray's sole and exclusive obligation and Customer's and Distributor's sole and exclusive remedy in relation to any Safety Update required to be provided by applicable law in the Customer's jurisdiction. By way of clarification, Accuray's sole obligation shall be to make such Safety Update available to Customer, and Accuray shall have no obligation (unless otherwise agreed by the Customer and Accuray) for installation or implementation of such Safety Update at the Customer's site. "Safety Update" means an error correction or change in the existing software and/or hardware configuration that is required for safety in order to enable the existing software and/or hardware configuration to perform to the existing functional specification(s) in accordance with applicable law in the Customer's jurisdiction. 4.6.5. Warranty Exclusions. All warranty replacement of Products and parts shall be limited to malfunctions which are due and traceable to defects in original material or workmanship of Products. The warranties set forth in this Section 4.6 shall be void 9 and of no further effect in the event of abuse, accident, alteration, misuse or neglect of Products, including but not limited to user modification of the operating environment specified by Accuray and user modification of any software. 4.6.6. Warranty Basis. Any limitation of liability under any warranty contained herein shall be an integral part of such warranty, which limits its scope (Section 444, second alternative German Civil Code shall not apply). Any limitation of liability for any defects contained herein shall be void insofar as Accuray has intentionally failed to disclose such defect. 4.7. Installation. Unless otherwise agreed by Accuray and Distributor (including, without limitation, pursuant to the terms of any distribution agreement entered into pursuant to Section 3.2 of the Strategic Alliance Agreement), Accuray shall be responsible for installation of Accuray Products at Customer sites. 4.8. Service Agreements. Accuray will provide its then current Service Agreements to Distributor from time to time during the Term of this Agreement and any extension thereof, or upon request from Distributor. All prices will be stated in US Dollars, unless another currency is agreed upon in writing by Accuray. Such Service Agreements are to be offered to the Customer on the terms as set forth in those agreements, unless otherwise agreed to in writing by an authorized representative of Accuray. Accuray shall execute a Service Agreement with the Customer upon receipt of (i) a copy of such Service Agreement executed by the Customer, and (ii) any payments then due under such Service Agreement; provided, however, that Accuray shall have no obligation to enter into such Service Agreement if it materially deviates from the form Service Agreement provided to Distributor; provided, further, that if Accuray does not have a direct presence in or Accuray does not have a distributor for the sales of Systems specifically for the country in which the Customer requests Services, as a condition to any sale of Services to such Customer, Accuray may require Distributor (solely with the consent of Distributor) to enter into a distribution agreement with Accuray pursuant to Section 3.2 of the Strategic Alliance Agreement providing, among other things, that Distributor may (at its sole discretion) enter into such Service Agreement with such Customer and will provide directly to such Customer the Services required to be performed under such Service Agreement. If Accuray enters into such Service Agreement with such Customer, Accuray will be responsible for and will provide to such Customer (either directly or through one or more of its distributors) the services required to be performed under such Service Agreement. 4.9. Customer Training. If training of Customer's personnel is included in a Purchase Order confirmed by Accuray, Accuray will provide such training in accordance with Accuray's then current training offerings and will coordinate with the Customer in order to provide such training
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Extract the exact clause related to "Warranty Duration" from the excerpt above.

assistant: Notwithstanding Section 4.6.2 and any obligations according to law, for a period of 10 years following Installation of a System, Accuray will provide to Customer, without charge, Safety Updates with respect to any hardware or software included in the System.