Anchor: A skater slides down a wall beside a long staircase.
Entailed: The skater is good at extreme sports.
Contradiction: The skater is skating on the ground.
Contradiction: There are no people on Earth.
Contradiction: The woofer has a knob to adjust the volume
Contradiction: Tuppence had no desire to hear her story.
Contradiction: The man with a shirt on stops to look.