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

[EX Q]: Which cyclist won the first medal for Team GB at the 2012 Olympic Games?
[EX A]: gb

[EX 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?
[EX A]: british railways board

[EX Q]: Which T Rex hit was called 'Bang A Gong' when it was released in the USA?
[EX A]:
bang a gong