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.

On September 29, 2015, the two companies announced the signing of a definitive merger agreement pursuant to which ComScore will acquire Rentrak in a merger valued at roughly $827 million.

Answer: owner_of