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From December 1971 to February 1976 he attended Tibet University for Nationalities in Xianyang , Shaanxi province , studying Literature .
 Tibet, Xianyang, Shaanxi
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Tibet, Xianyang, Shaanxi