Q: If "A young man goes air-born while his skateboard spins underneath him." does that mean that "The man is not wearing a helmet."?
Options:
- yes
- it is not possible to tell
- no
A: Not wearing a helmet is not implied by a man skateboarding.
The answer is it is not possible to tell.

Q: Premise: "A man approaches a street corner with carrying a basket of fruit on his head."
Hypothesis: "A man is sprinting."
Do we know that the hypothesis entailed by the premise?
A: One cannot approach somewhere carrying something on one's head and also be sprinting.
The answer is no.

Q: Premise: "A race car drives on a track while several people watch from behind rope."
Hypothesis: "A car moves in front of a group of people."
Do we know that the hypothesis entailed by the premise?
A: To race by spectators implies that the car goes in front of several people watching.
The answer is yes.

Q: Given the sentence "A little girl in a white shirt sliding down a green slide splashing into a blue baby pool." is it true that "A young girl in a dirty white shirt slides down a green slide that splashes into a blue pool full of rain water."?
A:
Not all white shirts are dirty. Not all baby pools are full of rain water.
The answer is it is not possible to tell.