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.

Who has the best winning percentage in college football history?
Michigan

When did leningrad changed back to st petersburg?
6 September 1991

What part of florida is florida international university?

University Park, Florida