Anchor: A boy hits a tennis ball with his tennis racquet.
Entailed: There is a boy in ground.
Contradiction: The boy is sitting and reading book.
Contradiction: Two dogs are sitting on a sofa.
Contradiction: The skateboarder went airborne in front of the crowd.
Contradiction: This sign of weakness caused delight in reactionary factions.
Contradiction: I studied the Vietnam War when I was at college.