Premise: "A young girl in a bathing suit and goggles with a cast on her lower arm is diving off a starter block into a swimming pool with lane lines."\nHypothesis: "A girl swimming in a lake."\nDo we know that the hypothesis entailed by the premise?
Let’s work this out in a step by step way to be sure we have the right answer.
no
The girl can't be in a swimming pool and a lake at the same time.

.

Thus, the answer is no