Anchor: A person wearing a black shirt is riding a bike in front of a red wall with a flower on it.
Entailed: Someone is cycling.
Contradiction: Nobody is using a vehicle.
Contradiction: A man fishes by himself in a blue boat.
Contradiction: A man wearing a white shirt riding on a motor scooter waiting in traffic as others stop behind him.
Contradiction: The system is set so that guilty people never go free. 
Contradiction: A man lifts another man.