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By June of the same year , three national universities ( University of Buenos Aires ( UBA ) , Universidad Litoral ( UNL ) and the University of Córdoba ( UNC ) ) were working together to design and implement the first official examination to measure competence of Spanish as a foreign language .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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