Utilize the input text as a context reference, choose the right relationship between Tribune Media and Chicago 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.

It has since split into Tribune Media Co, which owns broadcasting and digital media assets such as the WGN superstation, and Tribune Publishing Co, which owns newspapers such as the Chicago Tribune and Los Angeles Times.

Answer: headquarters_location