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: Who directed the film `Back To The Future`?

Answer: back to the future


Question: Which musical has the songs 'Another Suitcase In Another Hall' and 'Oh What A Circus'?

Answer: another suitcase in another hall


Question: Written by Edgar Allen Poe and published in 1845, what poem repeats the famous line `nevermore`?

Answer:
edgar allan poe