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As a composer he was and is deeply involved in Jewish topics , not only on the usual folkloristic or liturgical levels , but also confronted more abstract subjects of Jewish thought ( Oral Law , philosophical books of the Bible ) as well as Jewish History .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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