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: In 1864, the Dale Dyke Dam burst while being filled, leading to the death of 240 people in which British city?

A: dale dike reservoir
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Q: The Blue Fairy is a character in which Disney classic?

A:
the fairy with turquoise hair
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