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Sarah had to get Ishmael ( son of Hagar ) out of her house because legally Ishmael would always be the first born son even though Isaac was her natural child .
 Sarah, Ishmael, Hagar, Ishmael, Isaac
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sarah, Ishmael, Hagar, Ishmael, Isaac