[Q] Given the sentence "A boy in a hat on a swing." is it true that "The boy is on a rollercoaster."?
[A] The boy can't be on a rollercoaster while on a swing.
The answer is no.

[Q] Premise: "A man in a red helmet holds a bullhorn."
Hypothesis: "The man who was wearing a red firefighting helmet was also holding a bullhorn full of water."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
[A] Not all red helmets are firefighting helmets and there is no indication that the bullhorn is full of water.
The answer is it is not possible to tell.

[Q] Given the sentence "A brown dog biting a gray dogs ear." is it true that "A dog bites another dog's ear."?
[A] A brown dog is a dog biting ear of another dog (gray).
The answer is yes.