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He was Kantor at the Neustädter Kirche , Hannover , from 1972 to 1991 , where he concentrated on music in church services , but also conducted concerts , with a preference of works of Johann Sebastian Bach and his own teacher Ernst Pepping .
 Hannover, Johann Sebastian Bach, Ernst Pepping
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Hannover, Johann Sebastian Bach, Ernst Pepping