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At the start of Emperor Xuanzong 's Tianbao era ( 742-756 ) , Li Guangbi became the discipline officer at Shuofang Circuit ( 朔方 , headquartered in modern Yinchuan , Ningxia ) .
 Emperor Xuanzong, Li Guangbi, Yinchuan, Ningxia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Emperor Xuanzong, Li Guangbi, Yinchuan, Ningxia