[Q] Given the sentence "A smiling young girl wearing shorts and sandals climbs on a structure made of rope." is it true that "The girl is climbing up walls made out of thorns and swords."?
[A] A structure made of rope is not made of thorns and swords.
The answer is no.

[Q] Premise: "A man is standing behind and desk and there is part of a red car hanging above his head."
Hypothesis: "A man stands at work with his decorations around him."
Do we know that the hypothesis entailed by the premise?
[A] A man has part of a red car hanging behind his desk.
The answer is yes.

[Q] Premise: "Horseback riders file down a wooded path."
Hypothesis: "The amateur riders wear helmets for safety."
Do we know that the hypothesis entailed by the premise?
[A] Not all horseback riders are an amateur and file down a path does not imply to wear a helmet.
The answer is it is not possible to tell.