Utilize the input text as a context reference, choose the right relationship between Viacom and CBS from the options. Options: 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.

So we're going to get those from the slate we're using with CBS All Access in the U.S., from Showtime and from Viacom International Studios.

Answer: owned_by