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Championship Round of the 2006 World Baseball Classic was held at  Petco  Park San Diego  California  United States from March 18 to 20 2006 .
 state or province of headquarters: Petco, California
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
 Entity Pairs:  Petco, California 
Answer:
 state or province of headquarters: Petco, California