70774
He worked as a doctor from 1880 to 1905 in the Principality of Bulgaria .
 location: Principality of Bulgaria
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: Principality of Bulgaria 
Answer:
 location: Principality of Bulgaria