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When he returned to the United States , Mr. Cohen became a student of Ivan Galamian at the Juilliard School , and began a career as a freelance violinist .
 person of company: Ivan Galamian, Juilliard School
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
 Entity Pairs:  Ivan Galamian, Juilliard School 
Answer:
 person of company: Ivan Galamian, Juilliard School