premise: A guy is attempting to perform a skateboard trick while jumping over part of a white building in an attempt to land on the concrete outside. hypothesis: The guy is a skateboarder.
entailment: The guy is attempting a skateboard trick, therefore he is a skateboarder.|entailment: If a guy is attempting to perform a skateboard trick then he must be a skateboarder.|entailment: Skateboard  tricks only do in skateboard.