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By visiting them Monday , Bush emphasized the breadth of his appeal and the sometimes surprising vulnerability of the vice president .
 them, Bush, his, the vice president
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 them, Bush, his, the vice president