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In 1821 he moved to 54 Pall Mall , which had large galleries attached to it and , after a disastrous speculative venture in a panoramic exhibition , called the " Poecilorama " at the Egyptian Hall , opened these galleries for the sale of pictures on commission .
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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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