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More modern pieces showing styles of abstract expressionism , pop art , and art of the 1970 s through the end of the century can also be found represented by artists such as Arshile Gorky , Jackson Pollock , Clyfford Still , and Andy Warhol .
 person: Arshile Gorky; person: Jackson Pollock; person: Clyfford Still; person: Andy Warhol
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 person: Arshile Gorky; person: Jackson Pollock; person: Clyfford Still; person: Andy Warhol