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: Feb 15, 1564 saw the birth of what famed Italian physicist, mathematician, astronomer, and philosopher, who discovered the first 4 moons of Jupiter?

Answer: astronomer


Question: Which former Blue Peter presenter died in April 2004, aged 41?

Answer: blue peter


Question: Who released the 90s albums Definitely Maybe and What's The Story (Morning Glory)?

Answer:
(what's the story) morning glory?