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Alberto Piotti , security chief of Buenos Aires province , told local television that 3,600 dishonest officers had been purged from the force 's ranks in the past five years .
 person: Alberto Piotti; location: Buenos Aires
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, else, organization, person 
Text: {0} 
 Entities: Alberto Piotti, Buenos Aires 
Answer:
 person: Alberto Piotti; location: Buenos Aires