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 former Blue Peter presenter died in April 2004, aged 41?

SOLUTION: blue peter

PROBLEM: What breed of dog is Marmaduke in the newspaper cartoon strip of that name?

SOLUTION: dog

PROBLEM: Which singer has had a 2010 UK number one album with 'Aphrodite'?

SOLUTION:
album