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.

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

Who played chip douglas on my three sons?
Stanley Livingston

Who played sunny in law and order svu?

Peter Scanavino