259761
U.S. forces played a role in suppressing the rebellion : U.S. commanders planned and directed the military operations , U.S. military advisors accompanied all ROK units , and U.S. aircraft were used to transport troops .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None