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The Bolivia national football team played a total number of six international matches in the 1991 season under the guidance of manager Ramiro Blacutt , including four games at the 1991 Copa América .
 Bolivia national football team
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bolivia national football team