1107
The  United States  Air Force's 16th Space Control Squadron is an  Air Force Space Command  unit located at Peterson AFB Colorado and assigned to the 21st Space Wing .
 founded by: United States, Air Force Space Command
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "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} 
Answer:
 founded by: United States, Air Force Space Command