Q: If "Three dogs walking in the grass." does that mean that "The owner is walking his dogs."?
Options:
- yes
- it is not possible to tell
- no
A: Not all dogs have an owner. They could be strays that just happen to be walking in the grass.
The answer is it is not possible to tell.

Q: Can we conclude from "A little girl brushes her teeth with an orange and blue toothbrush." that "A smart human brushes."?
Options:
- yes
- no
- it is not possible to tell
A: The little girl isn't necessarily smart just because she brushes her teeth.
The answer is it is not possible to tell.

Q: Test for natural language inference.
Premise: "A group of people playing instruments."
Hypothesis: "A band is practicing for their show."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
A: The people playing their instruments may actually not be a band that's practicing for a show.
The answer is it is not possible to tell.

Q: Given the sentence "Three men in brown shorts are walking on rocks beside a river." can we conclude that "Three men are hiking."?
Options:
- yes
- it is not possible to tell
- no
A:
One cannot assume that the men walking on rocks are hiking.
The answer is it is not possible to tell.