4550
The System was heard in the United States and Canada as one of the then-ten dance/electronic music satellite channels operated by  Sirius XM Radio  which in turn operated as one of  XM Satellite Radio  's then-five dance/electronic formatted offerings broadcasting on XM channel 82 through a legacy business relationship between 1worldspace and XM .
 subsidiaries: Sirius XM Radio, XM Satellite Radio
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:
 subsidiaries: Sirius XM Radio, XM Satellite Radio