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Alfredo Aveline has bachelor 's and master 's degree in physics from Universidade Federal do Rio Grande do Sul ( UFRGS ) , where he was professor from 1969 to 1994 .
 Universidade Federal do Rio Grande do Sul
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Universidade Federal do Rio Grande do Sul