12132
During World War II the airline leased a portion of  its  fleet to the United States military and its facilities at  Dallas  Love Field and throughout the country became training sites for pilots and mechanics .
 city of headquarters: its, Dallas
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: its, Dallas