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He is the editor of Interlinguistica Tartuensis , a journal on interlinguistics published by the University of Tartu that published seven volumes from 1982 to 1990 recording the proceedings of colloquia at Tartu ; in 2006 , an eighth volume was published .
 Tartu, Tartu
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Tartu, Tartu