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According to Paul Dong , " It is hard to trace the origins of the empty force , but we know that Yang Luchuan ( 1799-1872 ) — a famous Tai Chi Chuan expert in China 's Qing Dynasty who was said to ' draw blood with every step ' — had mastered the empty force . "
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
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