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

Q: The Cato Street Conspiracy was a plot to kill which British Prime Minister?

A: prime minister of the united kingdom
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Q: Which river begins in the Rocky Mountains in south-west Colorado, crosses New Mexico and forms the border between Mexico and the USA before reaching the Gulf of Mexico?

A: new mexico
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Q: In which Australian state is the seaport of Bunbury?

A:
bunbury, western australia
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