Anchor: A boy rides his red bicycle down the handrail of a staircase in a city.
Entailed: A boy is demonstrating his bike riding expertise.
Contradiction: A boy rides his skateboard.
Contradiction: the man is tap dancing on broadway
Contradiction: John smiled when he noticed my shock at his mother's remarriage.  
Contradiction: A woman plays in a tennis match.
Contradiction: We have identified an opportunity for creating 6,000 more MWe of FGD.