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At this point he forged some extremely important friendships , with the painter Prospero Orsi , the architect Onorio Longhi , and the sixteen-year-old Sicilian artist Mario Minniti .
 Prospero Orsi, Onorio Longhi, Mario Minniti
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Prospero Orsi, Onorio Longhi, Mario Minniti