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

[Q]: Who composed 'Eine Kleine Nachtmusik' in the 18th Century?
[A]: eine kleine nachtmusik


[Q]: Which BBC current affairs programme, the longest-running in the world, is 60 years old this year ?
[A]: bbc


[Q]: What was the name of Benjamin Britten's opera about a lonely, isolated fisherman?
[A]:
benjamin britten