Anchor: a pitbull playing with a stick
Entailed: A pitbull is playing.
Contradiction: The pitpull is sleeping on a couch.
Contradiction: The man in camouflage is shooting at another man.
Contradiction: There was a macroeconomics disaster throughout the 1970s and early 1980s. 
Contradiction: the tent is on the beach.
Contradiction: Folks enter a building.