Please answer the following question by reasoning step-by-step.
Premise: "A white dog is trying to catch a ball in midair over a grassy field."\nHypothesis: "The dog is chasing a ball that someone threw."\nDo we know that the hypothesis entailed by the premise?

it is not possible to tell
A dog trying to catch a ball doesn't necessarily imply someone threw the ball.

.

So, the answer is it is not possible to tell