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One of his most successful recordings was " Cien Barrios Porteños " ( The one hundred barrios of Buenos Aires ) , to the point that presenters would announce him as " the singer of the 100 barrios " .
 Buenos Aires
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Buenos Aires