11791
Besides playing in various school ensembles and studying with private teachers , the group is coached every week by Ford Lallerstedt , a professor at the Curtis Institute of Music in Philadelphia and the director of music at St. Mark 's Episcopal Church in Mount Kisco .
 location contains: Philadelphia, Curtis Institute of Music
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:  Philadelphia, Curtis Institute of Music 
Answer:
 location contains: Philadelphia, Curtis Institute of Music