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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HOWEVER, THAT IF SELLER IN THIS INSTANCE HAS CONTRIBUTED TO SUCH LIABILITY, BUYER'S INDEMNITY TO SELLER SHALL BE REDUCED BY THE PROPORTION IN WHICH SELLER CONTRIBUTED TO SUCH LIABILITY. Seller will provide Buyer with reasonable notice and opportunity to defend in the event any claim or demand is made on Seller as to which such indemnity relates. 11. CARS, TRUCKS AND BARGES Buyer shall unload railroad cars, trucks and barges furnished by Seller within the free time specified by tariffs or time periods on file with applicable regulatory bodies, or promptly after receipt if no such tariffs or time periods are on file, and pay any charges Source: WEST PHARMACEUTICAL SERVICES INC, 8-K, 1/16/2020 resulting from its failure to do so directly to the common carrier upon receipt of invoice therefor. Buyer shall pay Seller's daily charges for trip-leased tank cars for tank cars held longer than seven (7) days from constructive placement. BUYER ASSUMES FULL RESPONSIBILITY FOR USE AND CONDITION OF CARS, TRUCKS AND BARGES WHILE IN BUYER'S POSSESSION AND AGREES TO (1) COMPENSATE SELLER FOR LOSS OR DAMAGE TO SELLER'S PROPERTY AND (2) INDEMNIFY AND SAVE SELLER HARMLESS FROM ANY LOSS OR DAMAGE TO PROPERTY OTHER THAN SELLER'S AND FROM ANY INJURIES TO PERSONS RELATING IN ANY WAY TO THE USE OF SUCH CAR(S), TRUCK(S) AND BARGE(S) WHILE SUCH ARE IN BUYER'S POSSESSION. Buyer shall report to Seller promptly any damage that may be sustained by the car(s), truck(s) or barge(s) in Buyer's possession. 12. LEASED TRACKS Seller may elect to provide rail cars of Product to Buyer on leased tracks. If Seller does so, Buyer shall contact Seller to receive shipments of Product from the leased tracks and not request such shipment directly from the railroad. 13. FAILURE IN PERFORMANCE No liability shall result to either party from delay in performance or non-performance in whole or in part caused by circumstances reasonably beyond the control of the party affected, including but not limited to acts of God, terrorist activity, transportation failure, breakdowns, equipment failure, criminal enterprise, sabotage, diminishment, or failure of power, telecommunications, data systems or networks, shortage or inability to obtain Product or raw material for Product, or good-faith compliance with any governmental order or request (whether valid or invalid). Notwithstanding any other notice requirement in this Agreement, actual notice (e.g., phone, email, letter) to a counterparty of a delay or failure described in this provision will constitute effective notice for purposes of this provision. Regardless, however, of the occurrence or nonoccurrence of any such circumstances, if for any reason supplies of or distribution logistics for Product, or feedstock for making Product, from any of Seller's existing sources are curtailed or are inadequate to meet Seller's own requirements and/or its obligations to its customers, Seller's obligation to deliver Product during such period shall be reduced to the extent necessary, in Seller's sole judgment, to apportion fairly among Seller's own requirements and its customers (whether under contract or not) such Product as received and as may be available in the ordinary and usual course of Seller's business from any existing sources of supply at the location(s) from which deliveries like those covered hereby are normally shipped. Seller shall not be obligated to purchase or obtain Product, or feedstock to make Product, to replace deliveries omitted or curtailed under this paragraph. 14. INTENTIONALLY OMITTED 15. EXPORT COMPLIANCE The transaction(s) specified herein, unless otherwise indicated, constitute domestic sales within the United States. For domestic U.S. sales, where Buyer chooses to subsequently export the Product, Buyer shall comply with all applicable laws relating to export controls and economic sanctions, including, but not limited to, those maintained by the US Department of the Treasury (Office of Foreign Assets Controls) and the US Department of Commerce (Bureau of Industry and Security). For U.S. domestic sales, if Buyer elects to export Product, Buyer shall constitute the U.S. Principal Party in Interest or Exporter for all purposes under applicable law. 16. NON-US BUYERS If Buyer is a natural or legal person of any jurisdiction other than the United States and/or a State thereof, any dispute arising with respect to the transaction(s) specified herein shall be referred to three (3) arbitrators in accordance with the Rules of Arbitration of the International Chamber of Commerce as in effect on the date of such referral. The arbitration shall take place in Houston, Texas, U.S.A. The proceedings shall be in the English language. The American Arbitration Association shall act as appointing authority in the event required. Monetary awards
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Extract the exact clause related to "Minimum Commitment" from the excerpt above.