Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

Q: Which form of dementia is named after a German psychiatrist who first described it in 1906?

A: dementia
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Q: Which English king was the son of Edward, the Black Prince?

A: edward, the black prince
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Q: What is the nationality of Chelsy Davy, former girlfriend of Prince Harry?

A:
chelsy davy
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