Q: Given the sentence "A little girl sitting on bleachers." is it true that "A little girl is sitting down."?
A: Sitting on a bleachers can be only done while sitting down.
The answer is yes.

QUESTION: Test for natural language inference.
Premise: "A man smiling as he is driving a large truck."
Hypothesis: "The man is thinking about his wife."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell

Let's solve it slowly: A man smiling as he is driving a large truck does not indicate that he is thinking about his wife.
The answer is it is not possible to tell.

[QUESTION] Premise: "A man in a white tank top plays the piano accompanied by someone on guitar."
Hypothesis: "A band is playing in front of a small crowd."
Do we know that the hypothesis entailed by the premise?
Two people playing musical instruments doesn't imply that they are playing them in front of a crowd.
The answer is it is not possible to tell.

Q: Can we conclude from "A man wearing white overalls and a baseball cap is holding a paintbrush." that "A man in overalls is building a table."?
Options:
- yes
- no
- it is not possible to tell
A: Holding a paintbrush and building a table are not the same.
The answer is no.

QUESTION: Test for natural language inference.
Premise: "A man dressed in a blue shirt and dark colored pants sits in front of several computer monitors."
Hypothesis: "A man is getting surgery on his back."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell

Let's solve it slowly: The man can't sits in front of a monitor while getting surgery.
The answer is no.

QUESTION: Premise: "A young man is skateboarding on a cement block wall."
Based on this premise, can we conclude that the hypothesis "A young man is practicing for a professional skateboarding match." is true?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly:
The young man is skateboarding on a cement wall but that doesn't mean that he is practicing for a professional skateboarding match.
The answer is it is not possible to tell.