Anchor: Two dogs biting another dog in a field.
Entailed: dogs attacking another dog
Contradiction: dog sitting in filed
Contradiction: He'll give you 20 shillings. It wasn't written by Tuppence.
Contradiction: We do it by lethal injection and it is more civilized.  
Contradiction: A baby crawls on the floor, eating fallen Cheerios.
Contradiction: man thinks he is driving the train he is on.