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: Where do scholars believe food production first began in the middle east?

A: Fertile Crescent
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Q: Where does bile go after it leaves the gallbladder?

A: small intestine
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Q: Who is singing the main title for world cup 2018?

A:
Aida Garifullina
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