Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
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Question: Who, as the first chairman of the British Rail Board, infamously directed the huge reduction in railway lines across the UK in the 1960s?

Answer: british railways board

Question: In what story of Arthur C. Clarke do Tibetan monks seek to list all the names of God as they believe He will bring the Universe to an end once this is done?

Answer: arthur c. clarke

Question: Which horse won the 2009 Cheltenham Gold Cup?

Answer:
2009 cheltenham gold cup