QUESTION: Premise: "People at a party standing around an illuminated fountain."
Hypothesis: "Nobody at a party."
Do we know that the hypothesis entailed by the premise?

Let's solve it slowly: Nobody means no people present and there could not be people present if no one is there.
The answer is no.

QUESTION: If "A girl wearing a pink skateboard helmet is riding in a skateboard bowl." does that mean that "The girl in the skateboard bowl with the pink helmet is the best in her class."?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly: Not all helmet is pink. Just because a girl wearing a pink skateboard helmet is riding in a skateboard bowl dos not mean that she is the best in her class.
The answer is it is not possible to tell.

QUESTION: Premise: "A man is leading an ox pulling a cart through a rain forest."
Hypothesis: "A man is pulling an ox through the desert."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly:
A man is pulling an ox either through the a rain forest or the desert.
The answer is no.