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In the 2011 federal election Trottier won the  Toronto  riding of Etobicoke Lakeshore defeating Leader of the Liberal Party  Michael Ignatieff  who was also the incumbent Leader of the Official Opposition .
 Toronto, Michael Ignatieff
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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:
 Toronto, Michael Ignatieff