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Divisions between Canada and Mexico economic partners with Washington in the  North American Free Trade Agreement  ( NAFTA ) hit a particularly low point last July when  Ottawa  imposed visa requirements on Mexicans visiting Canada in a bid to stem a surge in refugee claims .
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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:
 NA: North American Free Trade Agreement, Ottawa