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

[EX Q]: Who wrote the novel 'Brideshead Revisited'?
[EX A]: brideshead revisited

[EX Q]: Who is the only British Prime Minister to serve under 3 monarchs?
[EX A]: prime minister of the united kingdom

[EX Q]: Which composer won an Oscar for the music score in the film 'Bridge on the River Kwai'?
[EX A]:
the bridge on the river kwai