QUESTION: Given the sentence "A snowboarder glides down a stair rail." is it true that "A sad snowboarder glides down a stair rail."?

Let's solve it slowly: A snowboarder who glides down a rail doesn't particularly suggest sad snowboarder.
The answer is it is not possible to tell.

[QUESTION] Premise: "Tall man in red and black stands outside holding basketball."
Based on this premise, can we conclude that the hypothesis "A man wears red and black." is true?
Options:
- yes
- it is not possible to tell
- no
A man in red and black means he wears red and black.
The answer is yes.

Q: Premise: "A band playing in front of a crowd outside."
Hypothesis: "A band plays in the enclosed auditorium."
Do we know that the hypothesis entailed by the premise?
A: The band cannot be outside and in an enclosed auditorium simultaneously.
The answer is no.

QUESTION: Premise: "A man is sleeping on the floor with a sleeping dog across his chest."
Hypothesis: "A man and his dog take a nap together."
Do we know that the hypothesis entailed by the premise?

Let's solve it slowly: If the man and dog are sleeping then they are together.
The answer is yes.

[QUESTION] Can we conclude from "After being thrown in the air a young man dressed in a blue t-shirt and black shorts is getting ready to be caught by other young men in the same type of t-shirt and black shorts in a gym with softball championship banners hanging high in the background." that "There is only one person present."?
Options:
- yes
- no
- it is not possible to tell
Young men is more than one person. Championship implies many are present.
The answer is no.

Q: Test for natural language inference.
Premise: "A man is at a microphone looking at some papers with a picture on a screen that is behind him."
Hypothesis: "The man is looking at papers."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
A:
Looking at some papers is a rephrasing of looking at papers.
The answer is yes.