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 played guitar in no sleep till brooklyn?

Ex Output:
guitarist for Slayer


Ex Input:
How are point sources of pollution regulated by the cwa?

Ex Output:
requires dischargers to obtain a National Pollutant Discharge Elimination System (NPDES) permit


Ex Input:
What were the 13 original states of the united states called?

Ex Output:

Thirteen American Colonies