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Roy Lichtenstein , one of the best-known pop art painters , specifically chose individual panels from comic books and repainted the images , modifying them to some extent in the process but including in the painting word and thought balloons and captions as well as enlarged-to-scale color dots imitating the coloring process then used in newsprint comic books .
 Roy Lichtenstein
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:
 Roy Lichtenstein