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: Who's the best selling artist of all time?

SOLUTION: The Beatles

PROBLEM: Who played the first lady in olympus has fallen?

SOLUTION: Ashley Judd

PROBLEM: Who wrote song have i told you lately that i love you?

SOLUTION:
Scotty Wiseman