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

Q: Barabas is the central character in what 16th century play?

A: barabas
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Q: The Bob Dylan songs 'Desolation Row', 'Tombstone Blues' and 'Like A Rolling Stone' featured on which album?

A: tombstone blues
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Q: Which two brothers had hits with Cathy's Clown and Wake Up Little Susie?

A:
cathy's clown
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