Q: Given the sentence "A collection of boats gathers on the ocean during a sunny day." is it true that "Boats gather on a sunny day."?
A: A sunny day is sunny regardless of whether it is on the ocean or elsewhere.
The answer is yes.

Q: Premise: "One girl is doing a handstand on an outdoor trampoline while another girl stands on the trampoline with one hand in the air."
Hypothesis: "Handstands are very difficult to do when you are older."
Do we know that the hypothesis entailed by the premise?
A: The fact that handstands are very difficult to do when you are older is implied by the fact that two different girls are doing handstands on trampolines.
The answer is yes.

Q: Given the sentence "An old black man sitting in front of a white and blue shack." is it true that "A man is selecting ripe bananas in a crowded market."?
A: He would not be sitting in front of a shack while he was selecting ripe bananas.
The answer is no.

Q: Premise: "Three people in winter clothing lying down in the snow."
Hypothesis: "The people people are making snow angels in the snow."
Do we know that the hypothesis entailed by the premise?
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Three people in winter clothing lying down in the snow doesn't mean they are making snow angels in the snow.
The answer is it is not possible to tell.