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

[Q]: Alexander the Great died in which ancient city?
[A]: alexander the great


[Q]: Which comedian starred in the ABC sitcom Chicken Soup?
[A]: chicken soup


[Q]: Which computer game invented by Alexi Pajitnov celebrated its 25th anniversary in 2009?
[A]:
alexey pajitnov