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: Mark made by a seal or a stamp?

Answer: impression


Question: Who started the fire at rick's on desperate housewives?

Answer: Porter, Preston


Question: What is the fluid-filled space behind the oval window?

Answer:
cochleae