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A pianist and composer , Ms. Rittmann was first hired by Lincoln Kirstein in 1937 , played piano for George Balanchine 's American Ballet Caravan -- a forerunner of the New York City Ballet -- and was a concert pianist for the choreographer Agnes de Mille .
 person of company: George Balanchine, New York City Ballet
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: 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} 
Answer:
 person of company: George Balanchine, New York City Ballet