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Since succeeding his father , Grand Rabbi Avraham Abba Leifer , as Rebbe in 1990 , he has expanded the Hasidic presence in Ashdod , Israel with new schools and institutions , and increased the number of Pittsburger families to 100 in Ashdod .
 Avraham Abba Leifer, Rebbe, Ashdod, Ashdod
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Avraham Abba Leifer, Rebbe, Ashdod, Ashdod