[Q] Test for natural language inference.
Premise: "Grandparents are discussing their son's future seriously."
Hypothesis: "The grandparents did not have children."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
[A] There can be no son if they did not have children.
The answer is no.

[Q] Given the sentence "A man is crossing a street at a crosswalk." can we conclude that "A man is playing baseball in the park."?
Options:
- yes
- it is not possible to tell
- no
[A] One can't be crossing a street while playing baseball. A crosswalk is not a park.
The answer is no.

[Q] Given the sentence "Two dogs are running together through mowed grass." can we conclude that "Some dogs are running behind a cat."?
Options:
- yes
- it is not possible to tell
- no
[A] The two dogs are running together but that doesn't imply that they are running behind a cat.
The answer is it is not possible to tell.