What is the relationship between television and Video on Demand 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.

Rentrak's television ratings service is the only fully integrated system of detailed satellite, telco and nationwide cable television viewing information from approximately 35 million TVs and Video on Demand from more than 119 million TVs, including granular information for television stations in all 210 markets projected across the United States.

Answer: distribution_format