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Before moving to Australia he taught at Eberhard Karls University of Tübingen ( Germany ) , and has held visiting appointments at the University of Sarajevo ( Bosnia and Herzegovina ) and at Johann Wolfgang Goethe University of Frankfurt/M .
 Eberhard Karls University of Tübingen, University of Sarajevo, Johann Wolfgang Goethe University
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Eberhard Karls University of Tübingen, University of Sarajevo, Johann Wolfgang Goethe University