7981
Ownership and operation of the Irving group of companies ultimately divided among his three sons and their respective children James the oldest brother's two sons Jim Irving and Robert Irving took more control of forest products Arthur the middle brother assumed more autonomy in  Irving Oil  which owns  Saint John  New Bruswick Irving Oil Refinery Canada's largest refinery and Jack .
 city of headquarters: Irving Oil, Saint John
Given options, please tell me the relationships of all the listed entity pairs.Output format is "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} 
 Entity Pairs:  Irving Oil, Saint John 
Answer:
 city of headquarters: Irving Oil, Saint John