In this task, you're given an open-domain question. Your task is to provide an answer to the given question. There is only one unique answer for each question. Your answer should be short, and refer to an entity, date, number, etc. Do not put your answer in the context of a sentence.
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Question: When did the first season of greys anatomy air?

Answer: March 27, 2005


Question: Where does the water come from for victoria falls?

Answer: Zambezi River


Question: Where does run of the mill come from?

Answer:
early factory quality control-work that had not been graded