Premise: "A young man shocks the audience with his skateboard tricks."\nHypothesis: "The young man has been skateboarding for 10 years."\nDo we know that the hypothesis entailed by the premise?
Let's think step by step below.
it is not possible to tell
A young man shocks the audience with his skateboard tricks does not necessary that he has been skateboarding for 10 years.

.

So, the answer is it is not possible to tell