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On February 4 , 1823 , Bramston was appointed Coadjutor Vicar Apostolic of the London District and Titular Bishop of Usula by Pope Pius VII .
 Bramston, Pope Pius VII
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bramston, Pope Pius VII