14196
During the mid to late 1960s  Pacific Southwest Airlines  an airline based in  San Diego  trained its pilots at Brown Field using Piper Arrows Comanches Aztecs and Beech Bonanzas .
 city of headquarters: Pacific Southwest Airlines, San Diego
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: Pacific Southwest Airlines, San Diego