286139
It was used by the USAF as well as being the Headquarters of the Republic of Vietnam Air Force ( VNAF ) 4th Air Division until 1975 .
 organization: Republic of Vietnam Air Force
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: Republic of Vietnam Air Force 
Answer:
 organization: Republic of Vietnam Air Force