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Knell focused on maritime and particularly naval art and soon built up a successful practice , exhibiting regularly at the Royal Academy , British Institution and the Society of British Artists .
 Knell, British Institution, Society of British Artists
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Knell, British Institution, Society of British Artists