[QUESTION] Premise: "Two boys are helping clean up leaves at the side of the road."
Hypothesis: "Two boys are cleaning leaves."
Do we know that the hypothesis entailed by the premise?
Two boys are helping clean up leaves at the side of the road is the same as two boys that are cleaning leaves.
The answer is yes.

Q: Given the sentence "A woman in a green skirt is sitting on a bench outside." is it true that "The woman in black is sitting on a bench inside."?
A: A woman is either wearing a green skirt or the woman is in black. A woman is either outside or she is inside.
The answer is no.

QUESTION: Given the sentence "People wearing hats are gathered outside on a sunny day." is it true that "People are at the park for a picknic."?

Let's solve it slowly: People at a park may or may not be wearing hats and the day may not be sunny.
The answer is it is not possible to tell.

[QUESTION] Given the sentence "A group of people listening to a speech or presentation near the front of the room." is it true that "The people in the back can't hear."?
People in the back are not certain to not be able to hear.
The answer is it is not possible to tell.

Q: Premise: "The spray from water ejected by a woman's hair is reflecting the sunlight."
Hypothesis: "No one is in sight."
Do we know that the hypothesis entailed by the premise?
A: No one contradicts someone seeing water ejected by a woman's hair.
The answer is no.

[QUESTION] Premise: "A young man with darker skin and a shaved head is sitting down smoking a cigarette."
Hypothesis: "The man is sitting down drinking alcohol."
Do we know that the hypothesis entailed by the premise?
A young man with darker skin who is smoking cigarette will not have drinking alcohol habit.
The answer is no.