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The republic was established in the former territory of Eastern Armenia in the Russian Empire following the Russian Revolution of 1917 .
 location: Armenia; 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: Armenia, Russian Empire 
Answer:
 location: Armenia; location: Russian Empire