Anchor: Two dogs are in a grassy area.
Entailed: Animals are in the grass.
Contradiction: A group of cats are running down an alley.
Contradiction: We did not wait for the bags.
Contradiction: I realize we can't peoples' work for granted, having been to some Big Name schools. 
Contradiction: The man sleeps.
Contradiction: Did you open the poison cupboard and study the bottle?