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: Who played Bonnie in the 1967 film 'Bonnie And Clyde'?

Answer: bonnie and clyde

Question: Which Football League club play their home games at Kingsmeadow, also known as the Cherry Red Records Stadium?

Answer: kingsmeadow

Question: The second longest river in China, the Yellow River, is known locally as what?

Answer:
china