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: In which US state would you find the cities of Chesapeake, Roanoke and Fredericksburg?

Answer: fredericksburg


Question: The 2002 Winter Olympics were held in which city?

Answer: 2002 winter olympics


Question: What computer game invented by Alexi Pajtnov celebrated its 25th anniversary in June 2009?

Answer:
alexey pajitnov