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Media theorist Steven Johnson writes that , unlike popular culture , " the classics - and soon to be classics - are " in their own right descriptions and explanations of the cultural systems that produced them .
 Steven Johnson
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:
 Steven Johnson