Anchor: In a horse race five horses and five jockeys are clustered together competing for first place.
Entailed: A group of people are ridding horses outside.
Contradiction: Some jockeys are brushing their horses in the stalls.
Contradiction: The group of people have dogs next to them.
Contradiction: Steadily, they became more organized. 
Contradiction: There is no relationship between total steel requirement and the unit's capacity.
Contradiction: a skateboard rider rides down the steps of a building