TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: The plays 'The Barber of Seville' and 'Marriage of Figaro' were written by whom?

SOLUTION: the marriage of figaro

PROBLEM: Which American screenwriter, producer, director, actor, author and editor, most productive in the 1950's, made Plan 9 From Outer Space, Glen or Glenda and Bride Of The Monster?

SOLUTION: screenwriter

PROBLEM: Who played the title role in the film 'Carry On, Columbus'?

SOLUTION:
carry on columbus