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 does the voice of linda belcher on bob's burgers?

Ex Output:
John Roberts


Ex Input:
Where does the mora last name come from?

Ex Output:
Spanish


Ex Input:
A species that has an essential role in maintaining ecosystem structure is called a?

Ex Output:

Keystone species