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]: How many 10 cards are in a deck of 52 cards?
[EX A]: 4

[EX Q]: Who plays agent romanoff in iron man 2?
[EX A]: Scarlett Johansson

[EX Q]: How many episodes in season 2 of life unexpected?
[EX A]:
13