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The 1930 s and 1940 s were marked by instability and emergence of populist politicians , such as five-time President José María Velasco Ibarra .
 José María Velasco Ibarra
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 José María Velasco Ibarra