Anchor: A skateboarder wearing blue flannel is skating on a rock at a skate park.
Entailed: skateboarder is outside.
Contradiction: The skateboarder is sleeping on the couch.
Contradiction: The snowboarder has landed on his bottom.
Contradiction: The person knows how to swim.
Contradiction: Hello, are you ready to start?
Contradiction: They have a hunch who did the deed.