[Q] Given the sentence "A group of people congregate at a mall." is it true that "A group of people are at an outdoor concert."?
[A] The group cannot be at a mall and outdoor concert at the same time.
The answer is no.

[Q] Premise: "Young men and women shouting with serious looks on their faces."
Based on this premise, can we conclude that the hypothesis "Young men and women shout and hold signs at a protest." is true?
Options:
- yes
- it is not possible to tell
- no
[A] Shouting with serious looks is not always context for a protest.
The answer is it is not possible to tell.

[Q] Premise: "A man stands on top of a brick structure as another man looks on."
Based on this premise, can we conclude that the hypothesis "A man stands on top of a chimney looking down on his friend." is true?
Options:
- yes
- it is not possible to tell
- no
[A] The brick structure is not necessarily a chimney.The two men are not necessarily a friend to each other.
The answer is it is not possible to tell.