In the context of the input sentence, determine the relationship between 'Facebook' and 'Mark Zuckerberg'.
Options: creator, chairperson, operator, product/material produced

John Chambers, the chief executive of Cisco, may not be as recognisable a name as Mark Zuckerberg or Jack Dorsey of Twitter (Xetra: A1W6XZ - news ) , but when he took charge of the networking equipment giant in 1995 the future bosses of Twitter and Facebook (NasdaqGS: FB - news ) were still in school.
creator