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The Porfirio Díaz era at the end of the 19th century and beginning of the 20th was initially thwarted by regional bosses called caciques , bolstered by a wave of Spanish and mestizo farmers who migrated to the state and added to the elite group of wealthy landowning families .
 Porfirio Díaz
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Porfirio Díaz