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Shaan-Gan-Ning ( 陕甘宁边区 ) was one of the two border region governments with the capital at Yan ' an , named after the provinces of Shaanxi , Gansu , Ningxia .
 location: Yan ' an; location: Shaanxi; location: Gansu; location: Ningxia
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Yan ' an, Shaanxi, Gansu, Ningxia 
Answer:
 location: Yan ' an; location: Shaanxi; location: Gansu; location: Ningxia