Anchor: A rollerblader pauses at the top of a skate ramp.
Entailed: There is a rollerblader on the skate ramp.
Contradiction: The skateboarder paused at the top of the pool to think of his next move.
Contradiction: None of the statements have been affected by later statements, or affect earlier statements.
Contradiction: Young adults clean up.
Contradiction: The gift shop only sells candy and baked goods. 
Contradiction: The other person's face fell when he spoke.