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On December 15 , 1935 , Lamb was appointed Auxiliary Bishop of Philadelphia and Titular Bishop of Elo by Pope Pius XI .
 Lamb, Philadelphia, Pope Pius XI
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Lamb, Philadelphia, Pope Pius XI