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On Monday , Skype , a service that connects voice calls over the Internet , said its customers in North America could use their computers to call traditional telephone lines anywhere else in the United States and Canada free until the end of the year .
 North America, Canada
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
Answer:
 North America, Canada