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: Which 1995 'Space' move starred Tom Hanks; Bill Paxton and Kevin Bacon?

SOLUTION: tom hanks

PROBLEM: What creature appears in the coat of arms of Berlin?

SOLUTION:
berlin