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: Which actor spoke the line I love the smell of napalm in the morning* in the 1979 film Apocalypse Now?

Answer: apocalypse now

Question: Who was the scheming wife of the Roman emperor Claudius?

Answer: claudius

Question: In which 1995 'Oscar' nominated film did Anthony Hopkins play the part of a US President. Other parts were played by Ed Harris, E.G. Marshall, and David Hyde Pierce?

Answer:
anthony hopkins