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 band had a hit with the song 'Brown Girl in the Ring'?

SOLUTION: brown girl in the ring

PROBLEM: What was Casanova's occupation at the time of is death?

SOLUTION: giacomo casanova

PROBLEM: Which company owns the Costa coffee chain?

SOLUTION:
costa coffee