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The  168th Brigade Support Battalion  is a support battalion of the United States Army based at  Fort Sill  Oklahoma .
 city of headquarters: 168th Brigade Support Battalion, Fort Sill
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:
 city of headquarters: 168th Brigade Support Battalion, Fort Sill