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Made vicar general of the Diocese of Philadelphia in 1845 , he was Bishop Francis Kenrick 's " chief lieutenant " in the latter 's attempts to restore peace and order following the Know Nothing riots , and became " the most popular priest in the city among all classes . "
 Diocese of Philadelphia, Francis Kenrick, Know Nothing
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Diocese of Philadelphia, Francis Kenrick, Know Nothing