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The  28th Infantry Division  ( Keystone ) is a unit of the  Army National Guard  and is the oldest division-sized unit in the armed forces of the United States .
 subsidiaries: 28th Infantry Division, Army National Guard
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:
 subsidiaries: 28th Infantry Division, Army National Guard