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

Q: Name Shakespeare play Ariel, Miranda and Prospero appear?

A: ariel
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Q: Who achieved fame for his ,'Confessions Of An English Opium Eater'?

A: confessions of an english opium-eater
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Q: Who commanded the Confederate forces at the Battle of Gettysburg?

A:
confederate states of america
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