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:
In which year industrial development board was formed in pakistan pak301?

Ex Output:
1952


Ex Input:
Who sings are you with me lost frequencies?

Ex Output:
Dan Easton Corbin


Ex Input:
What is the oldest subway system in the us?

Ex Output:

Boston's MBTA Subway system