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's missing: Magnum Force, The Enforcer, Sudden Impact, and The Dead Pool?

Answer: sudden impact


Question: What famous novel invented the terms thoughtcrime and doubleplusgood?

Answer: newspeak


Question: Addis Ababa is the capital of which country?

Answer:
addis ababa