Premise: "A girl in a purple swimsuit is sitting by the pool."\nHypothesis: "While a girl in red goggles is in the pool."\nDo we know that the hypothesis entailed by the premise?
Step-by-step reasoning process below:
it is not possible to tell
The girl in the purple swimsuit is the older sister of the girl in red goggles.

.

So, the answer is it is not possible to tell