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Thus , he was the chief diplomatic representative of Estonia in the United States until Estonia regained independence in 1991 .
 location: Estonia; location: United States; location: Estonia
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Estonia; location: United States; location: Estonia