Anchor: One man riding a surfboard and one man laying on a surfboard on light waves.
Entailed: The two men are using their surfboards in the ocean.
Contradiction: The two men are diving into a olympic pool.
Contradiction: a boy swims alone
Contradiction: A man is on a dirt bike getting ready to make a turn.
Contradiction: A soccer player trying to score a touchdown.
Contradiction: Three people are walking.