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.

Shares of ComScore Inc. rose $3.53 to $45.02 in premarket trading while shares of Rentrak jumped $5.61, or 12.9 percent to $49.06.

Answer: owner_of