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He has held various guest lectureships , including in 1984 in the University of Frankfurt am Main and 1987 in Washington University , St. Louis , Missouri .
 organization: University of Frankfurt am Main; organization: Washington University; location: St. Louis , Missouri
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 organization: University of Frankfurt am Main; organization: Washington University; location: St. Louis , Missouri