199889
Air Force Historical Society Report , " Aircraft Combat Losses 1990-2002 " , www.afhra.af.mil/shared/media/document/AFD-070912-043.pdf
 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