[Q] Given the sentence "A dog lunges across a beach." is it true that "A dog jumps to get a bird."?
[A] A dog which lunges across a beach need not necessarily be jumping to get a bird.
The answer is it is not possible to tell.

[Q] Premise: "An old man is grilling food in a backyard."
Hypothesis: "The old man shopped for a new backyard grill at sears."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
[A] Grilling is present tense while shopped is past tense and a man cannot be in a backyard and at Sears simultaneously.
The answer is no.

[Q] Given the sentence "A woman in her underwear performing for a video." is it true that "She is filming an advertisement."?
[A] A woman in her underwear performing for a video is not necessarily filming an advertisement.
The answer is it is not possible to tell.