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When the entire Argentine railway network was nationalised during the Presidency of Juan Perón , most of the stations ( by then under the administration of State-owned company Ferrocarriles Argentinos ) were closed for passenger services to reduce costs , leaving only a few active .
 person: Juan Perón; organization: Ferrocarriles Argentinos
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: Juan Perón, Ferrocarriles Argentinos 
Answer:
 person: Juan Perón; organization: Ferrocarriles Argentinos