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: Which play and film was adapted from a story by Christopher Isherwood and later adapted as the musical and film Cabaret?

Answer: cabaret


Question: Which jockey won the 1981 UK Grand National on Aldaniti?

Answer: aldaniti


Question: What name is given to the group of elements that includes fluorine, chlorine, bromine and iodine?

Answer:
fluorine