13230
It was originally built as an interurban system connecting to the  Central California Traction  Company Western Pacific Railroad Southern Pacific Railroad and Atchison Topeka and Santa Fe Railway in  Stockton California  .
 city of headquarters: Central California Traction, Stockton California
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:
 city of headquarters: Central California Traction, Stockton California