Anchor: A competitor does a pole vault.
Entailed: An athlete competes in the pole vaulting event.
Contradiction: This man is training for hurdles.
Contradiction: Policeman sitting at a desk.
Contradiction: It is October 31st, and the child is trick-or-treating
Contradiction: You won't need water or shoes, they will be found on the way. 
Contradiction: The conception is that they need to have the newest things.