Anchor: Two men play their instruments while a third sings.
Entailed: The man sings while two men play their instruments.
Contradiction: Two men sing while a third plays an instrument.
Contradiction: The person is not smoking a cigarette
Contradiction: A hiker on a mountain side
Contradiction: All ferries arrive at the Smithsonian port. 
Contradiction: A young man wears a knit cap and jacket.