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

[EX Q]: Which analgesic drug, first isolated in 1804, was named after the Greek god of dreams ?
[EX A]: analgesic

[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 is the name of the female friend of children's television puppet Andy Pandy?
[EX A]:
andy pandy