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It was elevated to the status of archdiocese on June 29 , 1951 through the virtue of the Papal Bull “ Quo in Philippine Republica ” by Pope Pius XII .
 Pope Pius XII
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Pope Pius XII