Utilize the input text as a context reference, choose the right relationship between ComScore and Rentrak 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.

Sept 29 (Reuters) - Data analytics provider ComScore Inc said it would buy viewership rating company Rentrak Corp in an all-stock deal with an implied value of about $771 million to create a comprehensive measurement system for media and ad industries.

Answer: owner_of