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He traveled to  Mexico  where met and compared notes with his friends Diego Rivera and  David Alfaro Siqueiros  amongst others and in 1957 he exhibited his work at the palace of fine art in Mexico City .
 countries of residence: Mexico, David Alfaro Siqueiros
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:
 countries of residence: Mexico, David Alfaro Siqueiros