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.

Input: Consider Input: When did united last win the champions league?

Output: 21 May 2008


Input: Consider Input: Who plays agent romanoff in iron man 2?

Output: Scarlett Johansson


Input: Consider Input: Who has the best winning percentage in college football history?


Output: Michigan