QUESTION: Premise: "A young boy is punching a yellow ball."
Hypothesis: "A boy trying to punch a ball."
Do we know that the hypothesis entailed by the premise?

Let's solve it slowly: A boy can not both punch and be trying to punch a ball at the same time. The young boy is punching a yellow ball.
The answer is it is not possible to tell.

QUESTION: Given the sentence "A group of people standing around two men sitting wearing turbans." is it true that "The two men are in a chess tournament."?

Let's solve it slowly: Although the two men are sitting it doesn't imply they are in a chess tournament.
The answer is it is not possible to tell.

QUESTION: Given the sentence "A smiling bearded man wearing safety goggles and a brown checked shirt is holding a brown toy lemur which has a white face." can we conclude that "A man has a white rubber ball."?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly:
One can be having either a toy lemur or a rubber ball.
The answer is no.