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's the name for earth's supply of water?

Ex Output:
hydrosphere


Ex Input:
Who died in the movie 47 meters down?

Ex Output:
Kate


Ex Input:
Who sings san francisco flowers in your hair?

Ex Output:

Scott McKenzie