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 name is given to the disease whereby parasites can change the behaviour of rats and mice, making them drawn to rather than fearful of the scent of cats?

Answer: cat


Question: Which Renaissance artist's life was fictionalised in the book 'The Agony and the Ecstasy' subsequently made into a film?

Answer: the agony and the ecstasy


Question: Which 17th century Italian scientist is best remembered for inventing the Mercury Barometer?

Answer:
barometer