Test for natural language inference.
Premise: "An inline skater is grinding down a long rail."
Hypothesis: "The skater is doing tricks."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell Let's be accurate as possible and think first.

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
Just because the skater is grinding down a long rail doesn't mean he is performing tricks. Final answer: it is not possible to tell.