Premise: "A person sitting at the bottom of a skateboard ramp."
Hypothesis: "A person sitting at the bottom of a ramp."
Do we know that the hypothesis entailed by the premise?
Let's solve step-by-step:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
A person sitting at the bottom of a skateboard ramp is a person who is sitting at the bottom of a ramp. The answer is yes.