What is the relationship between ComScore and Rentrak in the context of the input sentence. Choose an answer from: 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.

NEW YORK (AP) -- Shares of ComScore soared more than 8 percent before the opening bell Wednesday on news that it would acquire Rentrak in an all-stock deal to create a larger ratings and media analysis company.

Answer: owner_of