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.

When did the drummer of def leppard lose his arm?
31 December 1984

What's the zip code for o'fallon missouri?
63366, 63368

Who was crowned emperor of the west in 800 ce?

Charles the Great