6761
David R. Sprung San Francisco The writer is a co-principal hornist of the San Francisco Opera Orchestra and was principal hornist for the San Francisco Ballet for 20 years .
 location contains: San Francisco, San Francisco 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:  San Francisco, San Francisco Ballet 
Answer:
 location contains: San Francisco, San Francisco Ballet