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As a student of Jan Pieterszoon Sweelinck , he was one of the most important organists and most respected pedagogues of the north German tradition before Johann Sebastian Bach .
 Jan Pieterszoon Sweelinck, Johann Sebastian Bach
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Jan Pieterszoon Sweelinck, Johann Sebastian Bach