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 was the scheming wife of the Roman emperor Claudius?

Answer: claudius


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

Answer: aldaniti


Question: Conchiglie is a type of what?

Answer:
conchiglie