Anchor: A guys in a big jacket being attacked by a dog while a guy in fatigues watches.
Entailed: The dog is very aggressive.
Contradiction: The man is petting the dog happily.
Contradiction: The woman is driving up the road.
Contradiction: Most homicide cases involve killing someone who someone else knows very well. 
Contradiction: We have no plans of getting a pet after our summer vacation.
Contradiction: It'll be necessary for the EPA to find ways of significantly reducing NOx emissions.