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

In the film 'Breakfast at Tiffanys', what is the name of Audrey Hepburn's character's cat ?
breakfast at tiffany's

Who played Lionel Hardcastle in the TV series 'As Time Goes By'?
as time goes by

Who was the wing commander who led the 'Dambusters' bomber raids in 1943?
operation chastise