Anchor: Two boys playing around the shores of a lake with one boy in a teal shirt throwing rocks into the lake.
Entailed: Two young men are having fun tossing stones into the nearby lake.
Contradiction: The boys are inside a building.
Contradiction: A couple of boys are having a picnic at the lake.
Contradiction: The boys are throwing some rocks near the open sea.
Contradiction: Two boys build a fort by a lake.
Contradiction: Two boys play drums inside.