[Q] Can we conclude from "Three people are standing at a concession stand outside." that "Nobody is at the concession stand."?
Options:
- yes
- no
- it is not possible to tell
[A] Either there is nobody there or there are three people there. It can't be both simultaneously.
The answer is no.

[Q] Given the sentence "Two women stand in the front of an elementary classroom while little children are setting in front of them." is it true that "A student teacher is supervised as she teaches her first 2nd grade class to a group of children."?
[A] One of the two women is not necessarily a supervised student teacher who is teaching her first 2nd grade class.
The answer is it is not possible to tell.

[Q] If "A toddler boy examines a pair of blue jeans." does that mean that "With an adult in the background."?
Options:
- yes
- it is not possible to tell
- no
[A] The toddler boy is about to get dressed and go to the park.
The answer is it is not possible to tell.