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

Q: Charlie Chaplin who died on Christmas Day in 1977, co founded which film studio along with Mary Pickford, Douglas Fairbanks?

A: douglas fairbanks
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Q: Which European country contains the ski resorts of Davos and Klosters?

A: klosters
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Q: Da Nang International Airport and Tan Son Nhat International Airport are located in which Asian country?

A:
da nang international airport
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