[QUESTION] Premise: "A large group of youths sitting and socializing on a graffiti-covered cement wall."
Hypothesis: "A large group of youths worked hard to sit on wall."
Do we know that the hypothesis entailed by the premise?
A group of youths cannot be working hard to sit on a wall while sitting and socializing on a graffiti covered wall.
The answer is no.

Q: Test for natural language inference.
Premise: "Group of people sitting on beach around campfire drinking soda pop and talking."
Hypothesis: "Some people are on the beach."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
A: Some of the people are a group on the beach are sitting around campfire drinking soda pop and talking.
The answer is yes.

QUESTION: Given the sentence "A railroad worker working on the rails." can we conclude that "He is wearing a helmet."?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly: A worker can be working on the rails without a helmet.
The answer is it is not possible to tell.

[QUESTION] Premise: "A city street is being cleaned by a man in a green vehicle."
Hypothesis: "The street is being cleaned."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
If a man is cleaning the street with a vehicle then the streets are being cleaned.
The answer is yes.

Q: Given the sentence "Here is a woman in a corn field." is it true that "Here is a person in a corn field."?
A: Sentence 1: Here is a woman in a corn field. Sentence 2: Here is a person in a corn field.
The answer is it is not possible to tell.

[QUESTION] Given the sentence "Two firefighters in full uniform walking in front of a firetruck." can we conclude that "Firefighters are walking in front of the firetruck to make sure nothing is broken."?
Options:
- yes
- it is not possible to tell
- no
Two firefighters can more vaguely be described as firefighters. Walking in front of a fire truck in full uniform is the same as walking in front of it in general.
The answer is yes.