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 united last win the champions league?

SOLUTION: 21 May 2008

PROBLEM: How many episodes are in season 4 of agents of shield?

SOLUTION: 22

PROBLEM: Who is the all time leading scorer in the premier league?

SOLUTION:
Alan Shearer