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He worked as an attorney for then  California  State Controller Gray Davis and also worked on the staff of California Senator  Barbara Boxer  .
 employee of: California, Barbara Boxer
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:  California, Barbara Boxer 
Answer:
 employee of: California, Barbara Boxer