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

[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.?
[A]: the dam busters

[Q]: The counties of Alameda, El Dorado, Fresno, Marin, Mariposa, Nevada, Orange, Riverside, Sacramento, San Bernardino, San Joaquin, San Mateo, Santa Clara, Santa Cruz, Sonoma and Ventura are in what state of the USA?
[A]: santa clara, california

[Q]: In the Bible who was the elder sister of Moses and Aaron?
[A]:
aaron