Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

The plays 'The Barber of Seville' and 'Marriage of Figaro' were written by whom?
the marriage of figaro

Who won the Women's Singles at the 2015 Australian Open Tennis Championships?
the championships, wimbledon

In which film did Clint Eastwood sing the song I Talk To The Trees'?

clint eastwood