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In that sense the plan -- which was approved by  Air Force  Secretary  Michael B. Donley  and Gen. Norton A. Schwartz the Air Force chief of staff -- helps cement a major cultural change at the service where many pilots initially recoiled at the idea of drones .
 employee of: Air Force, Michael B. Donley
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:  Air Force, Michael B. Donley 
Answer:
 employee of: Air Force, Michael B. Donley