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 is the name of the co-founder of Apple Computers who died in October 2011?

Answer: apple inc.

Question: In May 1940, who became British Prime Minister after the resignation of Neville Chamberlain?

Answer: prime minister of the united kingdom

Question: Which ballet by Aaron Copeland, first performed in 1944, contains a mountain range and a season in its name. It tells the story of a celebration of the building of a Pennsylvanian farmhouse?

Answer:
aaron copeland