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Italians from the Corpo Truppe Volontarie served in these mixed Italo-Spanish Flechas ( Arrows ) units where the Italians provided the officers and technical personnel , while the Spanish served in the rank-and-file .
 organization: Corpo Truppe Volontarie; organization: Flechas
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: Corpo Truppe Volontarie, Flechas 
Answer:
 organization: Corpo Truppe Volontarie; organization: Flechas