QUESTION: Can we conclude from "A band practicing with viewers." that "A band is playing music."?
Options:
- yes
- no
- it is not possible to tell

Let's solve it slowly: The band is practicing so that means they must be playing music.
The answer is yes.

[QUESTION] Test for natural language inference.
Premise: "For people in black pants and white martial arts shirts with belts hold a pose with both arms raised while three casually dressed me look on from a door on the left."
Hypothesis: "Some people stand in line."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
One can not stand in line and look on from a door simultaneously.
The answer is no.

Q: Given the sentence "A brown dog has a ball in his mouth while playing in the fence." is it true that "A dog fetches a ball to return to his owner."?
A: No indication the dog is with its owner. The dog may be by itself playing near the fence.
The answer is it is not possible to tell.

QUESTION: Test for natural language inference.
Premise: "A woman in an orange shirt and white skirt hits a tennis ball with a racket."
Hypothesis: "A woman is playing tennis against someone."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell

Let's solve it slowly: The woman who hits a tennis ball may note be playing against someone. She could be hitting it against a wall.
The answer is it is not possible to tell.

[QUESTION] Premise: "A topless muscular man is playing a stringed instrument outside."
Based on this premise, can we conclude that the hypothesis "A muscular man is playing a guitar at a park." is true?
Options:
- yes
- it is not possible to tell
- no
Not every stringed instrument is a guitar. There are many other places to be outside than at a park.
The answer is it is not possible to tell.

Q: Premise: "Two male firefighters working on the firetruck."
Based on this premise, can we conclude that the hypothesis "Two female firefighters work on the firetruck." is true?
Options:
- yes
- it is not possible to tell
- no
A:
Female Firefighters contradictory as against Male firefighters working on firetruck as mentioned in 1st sentence.
The answer is no.