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In support of Clinton , she wrote a press release entitled " Psychological Gang Bang of Hillary is Proof We Need a Woman President " , likening the reaction of Barack Obama and John Edwards to a gang rape .
 Clinton, Hillary, Barack Obama, John Edwards
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Clinton, Hillary, Barack Obama, John Edwards