[Q] Given the sentence "The lady and man wearing headphones while eating." is it true that "The couple listen to music while eating."?
[A] Not all lady and man are couple.Just because a man is wearing headphones doesn't mean that he listens to music.
The answer is it is not possible to tell.

[Q] Premise: "A runner jogging on a city street past a samsung advertisement banner."
Hypothesis: "A man is running the boston marathon and runs under a samsung banner."
Do we know that the hypothesis entailed by the premise?
[A] The runner could be a man or a woman. The runner isn't necessarily running in the Boston Marathon. The runner runs past a Samsung banner but he or she didn't necessarily run under the banner.
The answer is it is not possible to tell.

[Q] Premise: "A man in a blue jump shoot practices ninja jumps for a crowd of people."
Hypothesis: "A man is running on the treadmill in his basement."
Do we know that the hypothesis entailed by the premise?
[A] A man that practices ninja jumps cannot be the one running on the treadmill.
The answer is no.