TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Which Beatles song was also recorded by Peter Sellers?

SOLUTION: the beatles

PROBLEM: Which composer was married to Clara Wieck from 1840 until his death in 1856?

SOLUTION: clara schumann

PROBLEM: Which song provided a hit in 1958 for both English comedian Charlie Drake and US singer Bobby Darin?

SOLUTION:
bobby darin