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During this time he also collaborated in complete editions of the works of Arthur Schopenhauer and the writer Jean Paul and wrote numerous articles for various journals .
 Arthur Schopenhauer, Jean Paul
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Arthur Schopenhauer, Jean Paul