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BLITZER Attacking on the ground and calling in air strikes , Kurdish fighters and U . S . troops have dislodged stubborn Iraqi soldiers at a key bridge in northern Iraq .
 geographical social political: U . S; geographical social political: Iraqi; person: Kurdish; person: Kurdish fighters; person: U . S . troops; person: stubborn Iraqi soldiers at a key bridge in northern Iraq; facility: a key bridge in northern Iraq; location: northern Iraq
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 geographical social political: U . S; geographical social political: Iraqi; person: Kurdish; person: Kurdish fighters; person: U . S . troops; person: stubborn Iraqi soldiers at a key bridge in northern Iraq; facility: a key bridge in northern Iraq; location: northern Iraq