[Q] Given the sentence "A person in costume is trying to fly around a red pole." is it true that "A person is preforming in a circus."?
[A] A person can be flying in costume outside of a circus.
The answer is it is not possible to tell.

[Q] Test for natural language inference.
Premise: "Two men are using phone-booths that are located shortly outside of the downtown area of a city."
Hypothesis: "By some trees."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
[A] Two men are stranded and use the phone booths to call for help.
The answer is it is not possible to tell.

[Q] Premise: "Two men are sitting on a bench looking at a water fountain."
Hypothesis: "Two man are looking at a water fountain while sitting on a bench."
Do we know that the hypothesis entailed by the premise?
[A] Looking at a water fountain while sitting on a bench is rephrasing of sitting on a bench looking at water fountain.
The answer is yes.