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

[Q]: Charles Bingley was a character in what classic Jane Austen novel?
[A]: charles bingley

[Q]: Who, as the first chairman of the British Rail Board, infamously directed the huge reduction in railway lines across the UK in the 1960s?
[A]: british railways board

[Q]: Who was the first Prime Minister of Australia?
[A]:
australia