What is the relationship between Airbnb and Brian Chesky in the context of the input sentence. Choose an answer from: 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.

But Airbnb co-founder and chief executive Brian Chesky said "Belong Anywhere" was more than just a marketing slogan when he helped launch the new branding campaign in July 2014.

Answer: chief_executive_officer