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In a speech on Tuesday , U.S. President George W. Bush said that deploying a missile shield in Europe is necessary to counter an emerging nuclear threat from Iran .
 location: U.S.; person: George W. Bush; location: Europe; location: Iran
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: U.S., George W. Bush, Europe, Iran 
Answer:
 location: U.S.; person: George W. Bush; location: Europe; location: Iran