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His family was from Long Prefecture ( 隴州 , roughly modern Qingyang , Gansu ) , as the family settled there after his great-grandfather Duan Shijun ( 段師濬 ) served as the prefect of Long Prefecture .
 Prefecture, Qingyang, Gansu, Duan, Prefecture
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Prefecture, Qingyang, Gansu, Duan, Prefecture