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Very interested in painting , he also took courses with Augustin Feyen-Perrin and in 1870 he exhibited at the Salon a canvas entitled Rochers à Marée Basse ( Rocks at Low Tide ) , which was also later shown at London in 1872 .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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