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Some prominent writers , like Ivan Bunin and Vladimir Nabokov left the country , while a new generation of talented writers joined together in different organizations with the aim of creating a new and distinctive working-class culture appropriate for the new state , the Soviet Union .
 person: Ivan Bunin; person: Vladimir Nabokov; location: Soviet Union
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: Ivan Bunin, Vladimir Nabokov, Soviet Union 
Answer:
 person: Ivan Bunin; person: Vladimir Nabokov; location: Soviet Union