In the context of the input sentence, determine the relationship between 'Bouygues' and 'Martin Bouygues'.
Options: chief executive officer, stock exchange, director/manager, chairperson

In June, Bouygues head Martin Bouygues rebuffed a 10 billion euro bid for Bouygues Telecom, France's third-largest mobile operator, by Altice (ATCE.AS), the holding company of tycoon Patrick Drahi.
director/manager