QUESTION: Given the sentence "A group of people watches a boy on a skateboard launch off a ramp." is it true that "People are watching a boy skateboard."?

Let's solve it slowly: To skateboard of a ramp is one maneuver on a skateboard.
The answer is yes.

[QUESTION] If "Man with a black shirt on sit behind a desk sorting threw a giant stack of people work with a smirk on his face." does that mean that "A man wearing a black shirt sitting behind a desk sorting through a giant stack of paper work while smiling at work."?
Options:
- yes
- it is not possible to tell
- no
A smirk is a similar muscle formation on a human face as smiling.
The answer is yes.

Q: Given the sentence "Stop sign with an ""eating"" sticker below it and two girls standing beside it." is it true that "The girls are looking at the sign."?
A: Stop sign with an 'eating' sticker below it and two girls standing beside it doesn't mean that the girls are looking at the sign.
The answer is it is not possible to tell.

QUESTION: Given the sentence "People walking on tiles at an outdoor market." is it true that "People are inside a mall."?

Let's solve it slowly: An outdoor market takes place in a different setting than inside a mall.
The answer is no.

[QUESTION] If "A white guy in black biking gear is riding through the forest." does that mean that "A man is riding through the forest looking for his sister."?
Options:
- yes
- it is not possible to tell
- no
His skin color and the color of his biking gear doesn't tell us he is looking for his sister or that he even has a sister.
The answer is it is not possible to tell.

Q: Premise: "Two men wearing bright yellow vests sit in a vehicle."
Based on this premise, can we conclude that the hypothesis "People sit a truck wearing all black." is true?
Options:
- yes
- it is not possible to tell
- no
A:
People who are wearing all black cannot also be wearing bright yellow vests.
The answer is no.