Q: Given the sentence "A man with long hair is playing a guitar." is it true that "A hippie plays a cover of a led zeppelin song at a concert."?
A: A man with long hair doesn't necessarily mean a hippie. The fact that a man with long hair is playing a guitar doesn't imply that he plays a cover of Led Zeppelin song at a concert.
The answer is it is not possible to tell.

Q: Test for natural language inference.
Premise: "Man showering next to a window."
Hypothesis: "A man is showering."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
A: Even a man showering next to a window is still showering.
The answer is yes.

Q: Premise: "Woman doing yoga on a beach."
Based on this premise, can we conclude that the hypothesis "The woman is using a yoga mat." is true?
Options:
- yes
- it is not possible to tell
- no
A: Just because woman doing yoga on a beach does not indicate that she is using a yoga mat.
The answer is it is not possible to tell.

Q: Can we conclude from "One boy sitting on a rock in the middle of a body of water." that "The boy is young."?
Options:
- yes
- no
- it is not possible to tell
A:
The boy may not be young and could be an older boy.
The answer is it is not possible to tell.