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

[EX Q]: Which British composer wrote the music used as the theme for Desert Island Discs  He also wrote the Dambusters march and the Knightsbridge march.?
[EX A]: the dam busters

[EX Q]: What nationality was the composer Bela Bartok?
[EX A]: bela bartok

[EX Q]: In which city is the hotel Burj al-Arab, which markets itself as the world's first seven-star hotel?
[EX A]:
burj al arab