[Q] Premise: "Three girls holding umbrellas with their backs to the camera."
Hypothesis: "Three girls are holding umbrellas outside."
Do we know that the hypothesis entailed by the premise?
[A] Three girls holding umbrellas with their backs to the camera are not necessarily outside.
The answer is it is not possible to tell.

[Q] Premise: "A woman wearing jeans is reaching into a large box while a man wearing jeans stands beside her."
Hypothesis: "A woman is wearing blue jeans and reaching into a box."
Do we know that the hypothesis entailed by the premise?
[A] Not all jeans worn by women are blue. Jeans can be different colors. Not all boxes are large. Boxes can be different shapes and sizes.
The answer is it is not possible to tell.

[Q] Given the sentence "Group carrying injured man as spectators watch from behind fence." is it true that "The spectators pay no attention to the injured man."?
[A] The spectators can't be both watching and paying no attention at the same time.
The answer is no.