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

Q: Which novel by A J Cronin is credited with laying down the foundation in Great Britain for the introduction of the National Health Service?

A: a. j. cronin
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Q: Kronos (or Cronus) was the Greek equivalent of which Roman god?

A: cronus
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Q: Where were the 1988 summer Olympics held?

A:
1988 summer olympics
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