[QUESTION] Given the sentence "Several people are standing around a mechanical device of some type during a demonstration." is it true that "The people are all sitting down."?
First one states they are standing so they can't be sitting down as well.
The answer is no.

Q: Given the sentence "A man and woman are standing next to a rack of polka dotted shirts." is it true that "A man and woman eat dinner at a romantic restaurant."?
A: Man and woman that are standing next to a rack of polka dotted shirts cannot be the same that ear dinner at a romantic restaurant.
The answer is no.

QUESTION: Premise: "A group of young people smile for the camera."
Based on this premise, can we conclude that the hypothesis "Nobody is posing." is true?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly: A group is more then one where as Nobody is simply without anyone.
The answer is no.

[QUESTION] Premise: "A group of young girls in school uniforms walking down a street with two older men gawking at them."
Hypothesis: "The two older men do not acknowledge the young girls."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
If they do not acknowledge the young girls then they cannot be gawking at them.
The answer is no.

Q: Can we conclude from "Five ballet dancers caught mid jump in a dancing studio with sunlight coming through a window." that "The dancers are in practice."?
Options:
- yes
- no
- it is not possible to tell
A: The dancers are caught mid jump but that doesn't imply they are at practice.
The answer is it is not possible to tell.

[QUESTION] Test for natural language inference.
Premise: "A singer in a white coat singing into the microphone."
Hypothesis: "A singer sings while the mic stand falls down."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
It cannot be assumed that the mic stand is falling down.
The answer is it is not possible to tell.