Anchor: A person jumps a bicycle off a ramp in a barren forest.
Entailed: Someone jumping a bicycle off a ramp in a barren forest.
Contradiction: A person jumps a car off a ramp in a barren forest.
Contradiction: Combustion units are self-contained, no auxiliary equipment can be connected to them., 
Contradiction: I had a blank stare.
Contradiction: a man abducting a child
Contradiction: There are men in the kitchen.