Utilize the input text as a context reference, choose the right relationship between Vodafone and ONO from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Vodafone bought phone and Internet provider ONO for 7.2 billion euros ($8.0 billion) last year and has been integrating ONO's cable network into its own wireless services.

Answer: subsidiary