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 model was married to photographer David Bailey for 10 years, from 1975?

Answer: david bailey


Question: Which two brothers had hits with Cathy's Clown and Wake Up Little Susie?

Answer: cathy's clown


Question: What term related to human diet was coined in 1911 by Casimir Funk?

Answer:
casimir funk