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The Book of Ezra describes how he led a group of Judean exiles living in Babylon to their home city of Jerusalem ( ) where he is said to have enforced observance of the Torah .
 Babylon, Jerusalem
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Babylon, Jerusalem