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 is the smallest country in Central America Costa Rica, Venezuela or El Salvador?

Answer: central america


Question: Which TV screenwriter created the science fiction shows, Survivors and Blake's Seven?

Answer: blake's 7


Question: Which band released a 1977 album entitled 'Aja'?

Answer:
aja