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 jockey won the 1981 UK Grand National on Aldaniti?

Answer: aldaniti


Question: What was Bon Jovi's first UK top ten hit single?

Answer: bon jovi


Question: The Kalahari Desert in Africa stretches across South Africa, Botswana and which other country?

Answer:
botswana