In connection with the proposed merger, comScore intends to file a registration statement on Form S-4, which will include a preliminary prospectus and related materials to register the shares of comScore common stock to be issued in the merger, and comScore and Rentrak intend to file a joint proxy statement/prospectus and other documents concerning the proposed merger with the SEC.
In the context of the input sentence, determine the relationship between 'comScore' and 'Rentrak'.
Options: founded by, product/material produced, owner of, chairperson