I'll give you a question, please answer with step-by-step reasoning process.
Premise: "A dog is playing on the green grass."\nHypothesis: "The dog is chasing a ball."\nDo we know that the hypothesis entailed by the premise?

it is not possible to tell
A dog playing in grass is not assumed to be chasing a ball.

.

So, the final answer is it is not possible to tell