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]: In major depressive disorder what percentage of patients will suffer a recurrent episode?
[A]: 90%


[Q]: When did the first tim hortons open in the usa?
[A]: 1981


[Q]: How strong was hurricane harvey when it hit texas?
[A]:
Category 4