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

Q: Who played 'Emma Peel' in the 1998 film 'The Avengers'?

A: the avengers
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Q: Who painted The Card Players, at Feb 2012 the most expensive artwork in the world?

A: the card players
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Q: Which city does the extinct volcano known as Arthur's Seat overlook?

A:
arthur's seat
****