Anchor: An empty chair at an upscale restaurant.
Entailed: There is at least one empty chair at the restaurant.
Contradiction: All of the chairs have people sitting in them.
Contradiction: I wasn't trying to think about Asimov's Robot series.
Contradiction: A woman is walking in a village.
Contradiction: A group of men playing soccer.
Contradiction: A group of men in matching vests eat lunch.