10533
Some credit Simon's primary win to incumbent Governor Gray Davis ' preemptive campaign against Simon's major primary opponent former  Los Angeles  mayor  Richard Riordan  a moderate Republican whom Davis considered a more formidable opponent .
 employee of: Los Angeles, Richard Riordan
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "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} 
Answer:
 employee of: Los Angeles, Richard Riordan