Anchor: Many people are sitting on the edge of a rocky beach, watching others swim in the glistening water.
Entailed: People are swimming in water.
Contradiction: Everbody is swimming.
Contradiction: A rocky beach is empy of all people and the land is barren.
Contradiction: A group of people are having a barbecue on the sandy beach.
Contradiction: The beach and the water are deserted.
Contradiction: A group of friends are skiing