TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: What did Banting and Best discover in 1921?

SOLUTION: charles herbert best

PROBLEM: The Battle of Antietam was fought during which war?

SOLUTION: battle of antietam

PROBLEM: Singer Crispian Mills is the son of which famous actress?

SOLUTION:
crispian mills