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He was a member of the Staatsoper Stuttgart for more than 20 years and is known for interpreting the works of Arnold Schoenberg in collaboration with Michael Gielen and Pierre Boulez .
 organization: Staatsoper Stuttgart; person: Arnold Schoenberg; person: Michael Gielen; person: Pierre Boulez
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: Staatsoper Stuttgart; person: Arnold Schoenberg; person: Michael Gielen; person: Pierre Boulez