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: What famous novel invented the terms thoughtcrime and doubleplusgood?

Answer: newspeak


Question: In which 1960's TV series did Clarence the cross-eyed lion appear?

Answer: clarence, the cross-eyed lion


Question: The Drachma was which nation's main currency unit before the Euro in 2002?

Answer:
greek drachma