Premise: A teenage boy grinds his skateboard over a red rail.

Hypothesis: The teenage boy twirled a basketball on his finger, while walking across the gymnasium floor.
Relation: contradiction

Hypothesis: His blonde hair waving brilliantly in the summer breeze, the youngster flipped tricks with his new skateboard.
Relation: neutral

Hypothesis: A young boy was doing tricks on his skateboard.
Relation: entailment