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.

Q: Mark made by a seal or a stamp?

A: impression
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Q: Who's the best selling artist of all time?

A: The Beatles
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Q: Who plays dumbledore in the first harry potter?

A:
Richard Harris
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