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Yosef Leifer ( 1891 – 7 March 1966 ) was the founder and first Rebbe of the Pittsburg Hasidic dynasty in Pittsburgh , Pennsylvania , which he led for 42 years .
 Yosef Leifer, Pittsburgh , Pennsylvania
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Yosef Leifer, Pittsburgh , Pennsylvania