Utilize the input text as a context reference, choose the right relationship between Facebook and Menlo Park 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.

After years of using it at its offices in Menlo Park and around the world, Facebook had a product that it could take public.

Answer: headquarters_location