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Great artists closely associated with Romanticism include J.M.W. Turner , Caspar David Friedrich , John Constable , and William Blake .
 Romanticism, J.M.W. Turner, Caspar David Friedrich, John Constable, William Blake
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Romanticism, J.M.W. Turner, Caspar David Friedrich, John Constable, William Blake