Anchor:  Dave Hanson bent over the gears, cursing.
Entailed: Dave cursed as he bent over the gears.
Contradiction: Dave stopped cursing and backed away from the gears. 
Contradiction: A boy is performing maintenance on his bike.
Contradiction: A group of people watch a fireworks display.
Contradiction: The blue electrical train has a driver in the front of it.
Contradiction: A cake before cutting,