Premise: "A man rides a skateboard down the railing of a staircase in front of a closed storefront."\nHypothesis: "With three people watching him."\nDo we know that the hypothesis entailed by the premise?
Step-by-step reasoning process below:
it is not possible to tell
This was the man's first attempt at grinding a railing on his skateboard and the spectators were impressed.

.

Therefore, the answer is it is not possible to tell