Q: Premise: "A young boy sits on the lap of a man behind the wheel of a vehicle."
Based on this premise, can we conclude that the hypothesis "A father teaches his young son to drive." is true?
Options:
- yes
- it is not possible to tell
- no
A: We can't say he teaches him to drive; they may just be having fun.
The answer is it is not possible to tell.

Q: Given the sentence "Metal supports make a repeating x shape along the walls of the station." can we conclude that "This is the only station with metal supports in a x shape."?
Options:
- yes
- it is not possible to tell
- no
A: The station cannot be the only station with metal supports in a X shape.
The answer is it is not possible to tell.

Q: If "A musical performer in a black dress praises her crowd as red lights flash and her band plays." does that mean that "The woman is wearing a red dress."?
Options:
- yes
- it is not possible to tell
- no
A: A black dress is a different color than the red dress.
The answer is no.

Q: Given the sentence "A skateboarder grinds a rail." is it true that "A skateboarder is at a competition."?
A:
A skateboarder who grinds a rail is not necessarily at a competition.
The answer is it is not possible to tell.