Can the 5E Silence spell be cast on a person or object?

@RevLouisBrentonCan the 5E Silence spell be cast on a person or object, or only on a point in space? only on a point – prevents it from making Stealth much less useful

— Mike Mearls (@mikemearls) February 6, 2016

The silence spell is centered on a point in space, not on a creature or an object. #DnD https://t.co/nZs25sskbm

— Jeremy Crawford (@JeremyECrawford) February 17, 2016