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:
What does the rosenberg self esteem scale measure?

Ex Output:
self-esteem


Ex Input:
How many pound in a bushel of corn?

Ex Output:
56


Ex Input:
Who did lionel messi play for before barcelona?

Ex Output:

Club Atlético Newell's Old Boys