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The Philadelphia Jewish 's William Penn population was estimated at 206,000 in 2001 , which was the sixth largest in the United States at that time .
 Philadelphia Jewish, William Penn, United States
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Philadelphia Jewish, William Penn, United States