Anchor: A guy is on a skateboard jumping up in the air with the skateboard, he is wearing a black sleeves shirt and white shorts and white tennis shoes, there is pavement and trees and buildings.
Entailed:  A guy is on a skateboard jumping up in the air.
Contradiction: A man is swimming in the ocean.
Contradiction: A backpacker rides a bike down a rocky mountain.
Contradiction: someone climbing through a window
Contradiction: We shouldn't talk about this.
Contradiction: A man is wearing a cycling outfit.