Analyze the relationship between 'Comcast' and 'Sky' within the context of the input sentence.
Options: subsidiary, original broadcaster, publisher, headquarters location

We're also reducing operating expenses while still maintaining good momentum in our key initiative, which is Sky Q, which is now in close to 50% of customers' homes or over 10 percentage points higher year-on-year, and the successful launch of Sky broadband in Italy, utilizing Comcast xFi technology.
subsidiary