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: Mar Chiquita (Cordoba) is the largest natural salt lake in which South American country?

Answer: mar chiquita lake

Question: In 2011, Christian Bale won a Best Supporting Actor Oscar for his role as an assistant to his half-brother in which boxing related film?

Answer: christian bale

Question: Mah Drysdale, Rebecca Scown, Juliette Haigh, Hamish Bond, Eric Murray, Pete Reed, Andrew Triggs Hodge, Ondrej Synek and Alan Campbell are international competitors in which sport?

Answer:
alan campbell