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: Who fired the shots that began the civil war?

Answer: Lt. Henry S. Farley


Question: Who wrote let's spend the night together?

Answer: Mick Jagger and Keith Richards


Question: For perfectly elastic body the value of coefficient of restitution is?

Answer:
1