Analyze the relationship between 'Facebook' and 'Mark Zuckerberg' within the context of the input sentence.
Options: founded by, location of formation, director/manager, developer

In California, he will hold a public meeting with Facebook (NasdaqGS: FB - news ) founder Mark Zuckerberg at the social network's headquarters, and visit tech giant Google (Xetra: A0B7FY - news ) and electric car and battery innovator Tesla.
founded by