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The type was sold only to Mexico 's national railroad , Ferrocarriles Nacionales de México ; 60 examples were built between May and August 1973 .
 location: Mexico; organization: Ferrocarriles Nacionales de México
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Mexico; organization: Ferrocarriles Nacionales de México