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 popular Doctor Who villains, it was revealed in 2011, are to be given 'a rest' by scriptwriters?

SOLUTION: doctor who

PROBLEM: Who won the Women's Singles at the 2015 Australian Open Tennis Championships?

SOLUTION: the championships, wimbledon

PROBLEM: What is the title of Charlie Chaplin's first full-length feature film?

SOLUTION:
charlie chaplin