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


[Q]: Who plays the tick in the amazon series?
[A]: Peter Szymon Serafinowicz


[Q]: When did softball change from white to yellow?
[A]:
2004