Anchor: A greyhound leaps in a race.
Entailed: A greyhound is racing.
Contradiction: A dog is sleeping in the back of a truck.
Contradiction: The performer is sitting in the street.
Contradiction: Tommy flattened the note carefully and responded in the affirmative.
Contradiction: A construction worker is working in the Antarctica.
Contradiction: We are now faced with a new set of challenges.