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

Q: Mr Barkis, Edward Murdstone and Tommy Traddles are all characters in which Charles Dickens novel?

A: charles dickens
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Q: Who won the 1954 Academy Award for Best Actress for her role in the film 'Country Girl'?

A: the country girl
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Q: What was the only single by ABBA to reach number 1 on the US Billboard charts?

A:
abba
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