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It is completely in contrast with classical theories of fashion consumption , such as the ones of Georg Simmel and Thorstein Veblen , according to which the upper classes are the ones who dictate the fashion flow .
 Georg Simmel, Thorstein Veblen
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:
 Georg Simmel, Thorstein Veblen