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 singer provides the voice for Chef in South Park?

Answer: chef


Question: Who plays Isobel Crawley in the UK television series 'Downton Abbey'?

Answer: downton abbey


Question: Chris Stein, Debbie Harry, Clem Burke, Jimmy Destri and Gary Valentine, originally billed as Angel and the Snake, achieved fame under what name?

Answer:
gary lachman