TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: In which 1960's TV series did Clarence the cross-eyed lion appear?

SOLUTION: clarence, the cross-eyed lion

PROBLEM: Which boxer won a 1.8m claim against promotor Frank Warren in March 2009?

SOLUTION: boxing

PROBLEM: Who played the part of companion Martha Jones in the 2007 series of Dr Who?

SOLUTION:
dr. who