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]: When is prison break season 5 coming back?
[A]: April 4, 2017


[Q]: When did ice dancing debut in the olympics?
[A]: 1976 Winter Olympics


[Q]: When was the north american free trade agreement signed?
[A]:
January 1, 1994