premise: A shirtless man wearing long pants is doing a skateboard trick in a metropolitan area where a man and woman are walking away from the camera. hypothesis: The shirtless man in long pants is skateboarding outside by the man and woman.
entailment: Wearing long pants is being in them.   Doing a skateboard trick is skateboarding outside as that is where skateboarding is done.  The man and woman are in the area of the skateboarder.