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Established on March 31 2006 the Nuclear Weapons Center ( NWC ) is  Air Force Materiel Command  (  AFMC  ) center of expertise for nuclear weapon systems .
 alternate names: Air Force Materiel Command, AFMC
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:
 alternate names: Air Force Materiel Command, AFMC