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 was the title of Britney Spears' second album (and the single that was released from it)?

Answer: britney spears


Question: Which of North America's Great Lakes has the same name as a province of Canada?

Answer: canada


Question: What 2003 mystery-detective novel by Dan Brown has been denounced as an attack on the Catholic Church and criticised for historical and scientific inaccuracy?

Answer:
dan brown