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The Workers ' Opposition ( Alexander Shlyapnikov , Alexandra Kollontai ) demanded that trade unions manage the economy through an " All-Union Congress of Producers " and that workers comprise a majority of Communist Party members and leaders .
 organization: Workers ' Opposition; person: Alexander Shlyapnikov; person: Alexandra Kollontai; organization: Communist
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: Workers ' Opposition, Alexander Shlyapnikov, Alexandra Kollontai, Communist 
Answer:
 organization: Workers ' Opposition; person: Alexander Shlyapnikov; person: Alexandra Kollontai; organization: Communist