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Adolf Hitler had praised and incorporated eugenic ideas in " Mein Kampf " in 1925 and emulated eugenic legislation for the sterilization of " defectives " that had been pioneered in the United States once he took power .
 Adolf Hitler, 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:
 Adolf Hitler, United States