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Mario Roberto Santucho ( 12 August 1936 , Santiago del Estero – 19 July 1976 , Villa Martelli ) was an Argentine revolutionary .
 Mario Roberto Santucho, Santiago del Estero, Villa Martelli, Argentine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Mario Roberto Santucho, Santiago del Estero, Villa Martelli, Argentine