[Q] Premise: "Man doing a flip over concrete in front of people."
Hypothesis: "The man is performing for the circus in front of people."
Do we know that the hypothesis entailed by the premise?
[A] Just because man doing a flip over concrete in front of people does not imply that he is performing for the circus in front of people.
The answer is it is not possible to tell.

[Q] Test for natural language inference.
Premise: "A woman with long red-hair in a robin hood like outfit holding a large fighting ax."
Hypothesis: "A red-haired woman is holding an ax."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
[A] A woman with long red-hair in a Robin Hood like outfit holding an ax which is a large fighting ax.
The answer is yes.

[Q] If "A lady looks out of a subway car window." does that mean that "A lady is on a ferry crossing the river."?
Options:
- yes
- it is not possible to tell
- no
[A] A lady on a subway car can not be on a ferry.
The answer is no.