Please answer the following question by reasoning step-by-step. Test for natural language inference.
Premise: "Several young people play on a sand dune."
Hypothesis: "They are trying to climb to the top of the dune."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell. Step-by-step reasoning:

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
People can play on the dune without trying to climb to the top. So the answer is it is not possible to tell.