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From 1918 - 1921 , he served in the Red Army during the Russian civil war , first as a signalman and later rising to the rank of inspector of a Special Commission concerning the numbers of the Red Army and Fleet ( Russian : Особая комиссия по вопросам численности Красной Армии и Флота ) of the Field Staff of the Supreme Military Soviet of the Republic ( Полевой штаб Реввоенсовета Республики ) [ 1 ] .
 organization: Red Army
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: Red Army 
Answer:
 organization: Red Army