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 played the title role in the 1955 film 'Davy Crockett, King Of The Wild Frontier'?

Answer: davy crockett


Question: Charles Bingley was a character in what classic Jane Austen novel?

Answer: charles bingley


Question: Who discovered the chemical elements Potassium, Sodium and Calcium?

Answer:
potassium