[QUESTION] Given the sentence "A group of people listening to a speech or presentation near the front of the room." is it true that "The people in the back can't hear."?
People in the back are not certain to not be able to hear.
The answer is it is not possible to tell.

Q: Given the sentence "A person holding a tennis racket hits a yellow tennis ball." can we conclude that "The person is throwing a baseball."?
Options:
- yes
- it is not possible to tell
- no
A: A person cannot hold a tennis racket while throwing a baseball.
The answer is no.

QUESTION: Test for natural language inference.
Premise: "Several women and children are walking along a graffiti covered wall."
Hypothesis: "A group of women are spending time away from their children."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell

Let's solve it slowly: Women spending time away from their children can not also be women and children walking along.
The answer is no.

[QUESTION] Premise: "A medical team is performing a surgery."
Based on this premise, can we conclude that the hypothesis "The medical team has the day off." is true?
Options:
- yes
- it is not possible to tell
- no
A medical team can't be performing a surgery on its day off.
The answer is no.

Q: Premise: "Beautiful lights accent trees on a dark night."
Based on this premise, can we conclude that the hypothesis "The trees have no lights." is true?
Options:
- yes
- it is not possible to tell
- no
A: The tree cannot be accented with beautiful lights if it has no ights.
The answer is no.

[QUESTION] Given the sentence "A person in a yellow shirt sits on a sidewalk." can we conclude that "The person is watching her child cross the street."?
Options:
- yes
- it is not possible to tell
- no
Not all persons who sit on sidewalks are watching children crossing the street.
The answer is it is not possible to tell.