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

The Chicago Tribune has reported that 200,000 visitors attended a free fan festival tied to the 2015 draft and noted that a university study pegged the draft's direct economic impact on Chicago at nearly $44 million, including hotel and restaurant revenue, sales-tax revenue and temporary jobs created.

Answer: headquarters_location