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Pei Songzhi ( 372 – 451 ) , style name Shiqi , was a historian and politician who lived in the late Eastern Jin Dynasty and the Liu Song Dynasty .
 Pei Songzhi, Liu Song
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Pei Songzhi, Liu Song