Utilize the input text as a context reference, choose the right relationship between NBCUniversal and Comcast 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.

Immigrant activists have staged protests against Trump in Los Angeles and Washington, D.C. Companies including Comcast Corp's NBCUniversal and retailer Macy's Inc. have severed ties with him.

Answer: founded_by