65
Four U . S . Army soldiers were killed when a suicide bomber attacked a military checkpoint today in Najaf .
 geographical social political: U . S; geographical social political: Najaf; organization: U . S . Army; organization: military; person: Four U . S . Army soldiers; person: a suicide bomber; facility: a military checkpoint
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: Najaf; organization: U . S . Army; organization: military; person: Four U . S . Army soldiers; person: a suicide bomber; facility: a military checkpoint