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Starting in the early 1950 's , he was concertmaster of the resident orchestras at the festivals directed by the cellist and conductor Pablo Casals , in Prades , France , and in San Juan , Puerto Rico .
 Pablo Casals, San Juan; Puerto Rico, San Juan; Puerto Rico, San Juan; Pablo Casals, San Juan
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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:
 Pablo Casals, San Juan; Puerto Rico, San Juan; Puerto Rico, San Juan; Pablo Casals, San Juan