Anchor: A person and trainer jumping from an airplane.
Entailed: The two people are in the air.
Contradiction: The person and trainer are jumping from a cliff.
Contradiction: The half-built aircrafts were hard to see because there were no lights around.
Contradiction: The person is riding an animal.
Contradiction: The river is full of fast and rough rapids, and this raft ride is perfect for people who love thrill.
Contradiction: Two friends are looking at the waves on the beach.