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's the best selling artist of all time?

Ex Output:
The Beatles


Ex Input:
Who acted as munna bhai in lage raho munna bhai?

Ex Output:
Sanjay Balraj Dutt


Ex Input:
How many miles is the mexican border to the united states?

Ex Output:

1,954 mi