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.

[EX Q]: Who discovered the center of the milky way galaxy?
[EX A]: a team of radio astronomers, led by Joseph Lade Pawsey

[EX Q]: When did the civil war end in sierra leone?
[EX A]: 18 January 2002

[EX Q]: Who wrote they long to be close to you?
[EX A]:
Burt Bacharach