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He served just over two tours of duty in Vietnam as a Marine Corps Combat Officer ; during his last tour he served as Commander of the Combat Art Team and much of his work from that period is now on display at the Smithsonian Institution of Washington D.C. Upon leaving Vietnam Long traveled to Florence  Italy  to apprentice himself to internationally-renowned Maestro  Pietro Annigoni  .
 countries of residence: Italy, Pietro Annigoni
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:
 countries of residence: Italy, Pietro Annigoni