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

They ought to establish a relationship with a mentor who is licensed to speak to them frankly: Mark Zuckerberg of Facebook has formed such a bond with Donald Graham, a former publisher of the Washington Post .

Answer: founded_by