Anchor: A skateboarder is doing a trick at the top of a ramp while another person watches.
Entailed: A person watches skateboarder doing a trick.
Contradiction: People are watching a girl ride a bike.
Contradiction: A woman is enjoying a plate of spaghetti.
Contradiction: NHTSA concluded the only legally acceptable option was to set the model year 1998 standard at 20.
Contradiction: A boy is telling jokes to the class.
Contradiction: One of the kids is unhappy.