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This grand approach was designed by architects Piacentini and Spaccarelli , on the instructions of Benito Mussolini and in accordance with the church , after the conclusion of the Lateran Treaty .
 Piacentini, Spaccarelli, Benito Mussolini
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Piacentini, Spaccarelli, Benito Mussolini