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The  172nd Infantry Brigade  ( Separate ) officially titled the 172d  Infantry Brigade  was first constituted on 5 August 1917 in the National Army as the 172nd Infantry Brigade .172 nd Blackhawk Brigade History United States Army .
 alternate names: 172nd Infantry Brigade, Infantry Brigade
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: 172nd Infantry Brigade, Infantry Brigade