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Originally , the work was presented by Rückoldt as his inaugural dissertation at the faculty of philosophy of the Friedrich-Schiller University of Jena , with which he attained the grade of doctor .
 Friedrich-Schiller University of Jena
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Friedrich-Schiller University of Jena