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The Soviet Union provided some limited assistance at the beginning of the war , but the result was a bitter fight among communists and anarchists at a series of events named May Days as Joseph Stalin tried to seize control of the Republicans .
 location: Soviet Union; person: Joseph Stalin
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: Soviet Union, Joseph Stalin 
Answer:
 location: Soviet Union; person: Joseph Stalin