225866
In 1888 , an unknown number of Arabs still lived in the Baku Governorate of the Russian Empire .
 location: Russian Empire
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: Russian Empire 
Answer:
 location: Russian Empire