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reporter : the revelations about kennedy ' s alleged affair with an intern make up just a couple lines in historian robert dowd ' s 700 - plus page biography .
 reporter, kennedy, an intern, historian, historian robert dowd
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 reporter, kennedy, an intern, historian, historian robert dowd