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: In book and film, which vessel was commanded by Charlie Allnut?

Answer: charlie allnut


Question: What are Proxima Centauri, Sirius A, Pollux, Arcturus and Betelgeuse?

Answer: arcturus


Question: What name was given to a group of painters who first exhibited in Paris in 1906, including Matisse, Bracque, Derain, van Dongen and Dufy, who presented bold forms, brilliant colours and clearly defined patterns?

Answer:
raoul dufy