10500
In 1957  he  began work on government commission for Chapultepec Castle in  Mexico  City ; Del porfirismo a la was his biggest mural yet .
 countries of residence: he, Mexico
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:  he, Mexico 
Answer:
 countries of residence: he, Mexico