TASK DEFINITION: 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.
PROBLEM: When did the song baby got back come out?

SOLUTION: May 7, 1992

PROBLEM: What's the name for earth's supply of water?

SOLUTION: hydrosphere

PROBLEM: What type of bonding is present in alloys?

SOLUTION:
metallic bonding