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The remaining intact F-14 aircraft in the U.S. were flown to and stored at the  309th Aerospace Maintenance and Regeneration Group  Boneyard at Davis-Monthan  Air Force  Base Arizona before being shredded to prevent any components from being acquired by Iran .
 subsidiaries: 309th Aerospace Maintenance and Regeneration Group, Air Force
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:  309th Aerospace Maintenance and Regeneration Group, Air Force 
Answer:
 subsidiaries: 309th Aerospace Maintenance and Regeneration Group, Air Force