Anchor: A jockey braces himself as his horse falls.
Entailed: A horse stumbles, as the jocky tries to keep his balance.
Contradiction: A jockey stands quietly by his resting horse.
Contradiction: Each area tends to consist of a big city. 
Contradiction: A person with a bag waits for a train.
Contradiction: People are swimming in the lake.
Contradiction: A group of kids are playing sports