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Founded in 1934 by George Balanchine and Lincoln Kirstein as a training ground for what would become New York City Ballet , it is as rigorous as the Paris Opera Ballet School , the Royal Ballet School in London and its own most direct ancestor : the Imperial Ballet School in St. Petersburg , where Balanchine trained .
 location contains: London, Royal Ballet School; person of company: George Balanchine, New York City Ballet
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:  London, Royal Ballet School; George Balanchine, New York City Ballet 
Answer:
 location contains: London, Royal Ballet School; person of company: George Balanchine, New York City Ballet