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Sadegh Hedayat commented that " if a man had lived for a hundred years and had changed his religion , philosophy , and beliefs twice a day , he could scarcely have given expression to such a range of ideas " .
 Sadegh Hedayat
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:
 Sadegh Hedayat