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The passenger train system was severely damaged by the privatization of most railway companies in the early 1990 s during Carlos Menem 's presidency but is slowly recovering .
 person: Carlos Menem
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: Carlos Menem 
Answer:
 person: Carlos Menem