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Vale Verde International School ( VVIS ) is an international school located in Burgau , Algarve , Portugal .
 Vale Verde, Burgau, Algarve, Portugal
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Vale Verde, Burgau, Algarve, Portugal