595
He was a graduate of the  United States Air Force Academy  in  Colorado Springs  Colorado .
 city of headquarters: United States Air Force Academy, Colorado Springs
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
 Entity Pairs:  United States Air Force Academy, Colorado Springs 
Answer:
 city of headquarters: United States Air Force Academy, Colorado Springs