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Greyhound Canada  is a subsidiary of Scotland's  FirstGroup plc  linked with Dallas-based Greyhound Lines ( also known as Greyhound USA ) .
 subsidiaries: Greyhound Canada, FirstGroup plc
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:  Greyhound Canada, FirstGroup plc 
Answer:
 subsidiaries: Greyhound Canada, FirstGroup plc