Anchor: One man in an arena trying to stay on a horse for as long as he can.
Entailed: One man trying to stay on a horse.
Contradiction: One man walking away from a horse in an arena.
Contradiction: a teenager was at the skate park
Contradiction: The basic tenets of economic theory are not correctly understood in this model. 
Contradiction: This is the worst thing I have ever read in my entire life.
Contradiction: A woman is feeding rabbits