20246
 They have established an exchange program that enables dancers from their training organizations the Royal Ballet School , of London , and the American Ballet Theater Studio Company , of New York to dance in each other 's cities . 
 location contains: London, Royal Ballet School
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: nationality, country capital, place of death, children, location contains, place of birth, place lived, administrative division of country, country of administrative divisions, company, neighborhood of, company founders 
Text: {0} 
 Entity Pairs:  London, Royal Ballet School 
Answer:
 location contains: London, Royal Ballet School