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 biologist was known as Darwin's Bulldog?

SOLUTION: charles darwin

PROBLEM: Who had a hit album in 2010 with Can't Be Tamed?

SOLUTION: can't be tamed

PROBLEM: Which English singer-songwriter's pet spaniel was a special guest at his civil partnership ceremony?

SOLUTION:
civil union