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 owns the treasure island in las vegas?

Ex Output:
Phil Ruffin


Ex Input:
When did star spangled banner became the national anthem?

Ex Output:
March 3, 1931


Ex Input:
Alkylating agents such as ethyl methanesulfonate (ems) function as mutagens to?

Ex Output:

developing large numbers of mutants for screening