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In the early 1860 s , four young painters : Claude Monet , Pierre-Auguste Renoir , Alfred Sisley and Frédéric Bazille , met whilst studying under the academic artist Charles Gleyre .
 Claude Monet, Pierre-Auguste Renoir, Alfred Sisley, Frédéric Bazille, Charles Gleyre
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Claude Monet, Pierre-Auguste Renoir, Alfred Sisley, Frédéric Bazille, Charles Gleyre