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Leyland Trucks  and BAE Systems are the  Central Lancashire  area's largest employers at their sites in Leyland and Samlesbury respectively .
 city of headquarters: Leyland Trucks, Central Lancashire
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: Leyland Trucks, Central Lancashire