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

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?
cat

Which engineer built the Menai Suspension Bridge and the Caledonian Canal?
menai suspension bridge

Which 1995 film featuring talking animals is based on a book by Dick King-Smith?

dick king-smith