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The Joy of Painting has been shown in many countries worldwide such as Greek state broadcaster ERT3 Turkish state broadcaster TRT ( with the title Resim Sevinci ) BR-alpha in Germany Discovery Real Time in the UK NHK in Japan EBS in South Korea and  Once TV  in  Mexico  ATV and ICable TV in Hong Kong IRIB in Iran and the Colombian state channel Canal Capital .
 country of headquarters: Once TV, 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:  Once TV, Mexico 
Answer:
 country of headquarters: Once TV, Mexico