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


[Q]: Who has to push the rock up the hill?
[A]: Sisyphus


[Q]: When did the actor who played dumbledore die?
[A]:
25 October 2002