Anchor: A young boy in a white hat and blue towel is carrying a snorkeling mask while walking on rocks on the shore of a blue lake.
Entailed: The boy has snorkel gear as he walks on the shore.
Contradiction: The boy is walking along the river bank.
Contradiction: A choice between a skirt and pants is sufficient.
Contradiction: There is no one in good health down there.  
Contradiction: A man rides a bull.
Contradiction: A boy is playing in the sand.