Anchor: A surfer is in the air while surfing in the ocean, and there is a foamy wave crashing everywhere.
Entailed: A surfer is surfing in the ocean.
Contradiction: The surfer bobs in the water.
Contradiction: A man is laying on the couch watching television.
Contradiction: A surfer gets eaten by a killer whale.
Contradiction: The surfer is sitting on the beach.
Contradiction: The surfer is on ice.