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 composed the opera 'Albert Herring' in 1947?

Answer: albert herring


Question: Who succeeded Henry Cooper as British Heavyweight Boxing Champion?

Answer: boxing


Question: Which band has released albums called `His n Hers` and `Different Class`?

Answer:
different class