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: On which date do we celebrate 'Boxing Day'?

Answer: boxing day


Question: In which Shakespeare play do the characters Ajax, Achilles and Ulysses appear?

Answer: achilles


Question: In which 1970 film, did Dustin Hoffman play the part of a hundred year old survivor of the Battle of The Little Big Horn?

Answer:
dustin hoffman