Anchor: A skateboarder attempts to do a trick over a homemade ramp.
Entailed: A skateboarder attempts a trick.
Contradiction: A skateboarder is eating his lunch outside by a park bench.
Contradiction: A skateboarder is sitting in a chair, staring out a window.
Contradiction: A skateboarder attempts to break his skateboard.
Contradiction: Someone is riding a bike.
Contradiction: The skateboarder has put his skateboard away for the evening and is enjoying dinner with his family