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While John McCain received 51.6 % of its vote to 47.1 % for Barack Obama , this was a far-closer margin than the 20 points that George W. Bush carried it by in 2004 .
 person: John McCain; person: Barack Obama; person: George W. Bush
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: John McCain, Barack Obama, George W. Bush 
Answer:
 person: John McCain; person: Barack Obama; person: George W. Bush