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 Input:
Who did the soviet union signed a nonaggression pact with in 1939?

Ex Output:
Nazi Germany


Ex Input:
How many series are there of the mentalist?

Ex Output:
7


Ex Input:
When does south park season 21 episode 4 come out?

Ex Output:

October 11, 2017