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Patricio Alberto Chávez Závala is an Ecuador ian political appointee and is the current Ambassador of Ecuador to Russia , presenting his credentials to Russian President Vladimir Putin on 11 December 2007 .
 Patricio Alberto Chávez Závala, Ecuador, Ecuador, Vladimir Putin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Patricio Alberto Chávez Závala, Ecuador, Ecuador, Vladimir Putin