Q: Given the sentence "The lead singer of a band is wearing white glasses while standing in front of a microphone stand with a white boa wrapped around it." is it true that "The singer isn't wearing glasses."?
A: The singer cannot be wearing glasses and not wearing glasses at the same time.
The answer is no.

Q: Test for natural language inference.
Premise: "A man is looking into the distance whilst people behind him walk between buildings."
Hypothesis: "A man is behind the wall."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
A: You can be by buildings and not be behind the wall.
The answer is it is not possible to tell.

Q: If "A weimaraner dog runs through the woods wearing a red collar." does that mean that "The dog wears a white collar."?
Options:
- yes
- it is not possible to tell
- no
A: A dog cannot wear a red collar and a blue collar simultaneously.
The answer is no.

Q: Given the sentence "A man sells food on the street." can we conclude that "A hot dog vendor sells food on the street downtown."?
Options:
- yes
- it is not possible to tell
- no
A:
Downtown is not the only place where street vendors sell hot dogs.
The answer is it is not possible to tell.