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Philosopher Han Fei synthesized together earlier the methods of his predecessors , which famous historian Sima Tan posthumously termed Legalism .
 Han Fei, Sima Tan
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Han Fei, Sima Tan