[Q] Given the sentence "Two men with guitars and a woman are performing a song live." is it true that "A band is playing live."?
[A] Men and a woman can perform live by playing guitars; they can be considered a band.
The answer is yes.

[Q] Given the sentence "A group of several people standing around a railing." can we conclude that "There are more than two people around a railing."?
Options:
- yes
- it is not possible to tell
- no
[A] A group of several implies that they are more than two.
The answer is yes.

[Q] If "A woman in a blue coat is walking by a poster." does that mean that "The woman is sitting on the grass in a park."?
Options:
- yes
- it is not possible to tell
- no
[A] One cannot be both sitting and walking at the same time.
The answer is no.