Anchor: a kayaker tumbles over.
Entailed: A person on a kayak tumbles over.
Contradiction: A person tumbles over the edge of a skyscraper on a kayak.
Contradiction: He came to work and quickly made hamburgers. 
Contradiction: Someone is involved in a stretching regimen in the park.
Contradiction: People are fighting each other by throwing rocks.
Contradiction: the people in the kitchen are cooking