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