Q: Premise: "A person wearing a white shirt and black pans is jumping of a riff."
Hypothesis: "Someone is jumping into some water."
Do we know that the hypothesis entailed by the premise?
A: A person is jumping of a riff doesn't imply that someone is jumping into some water.
The answer is it is not possible to tell.

Q: Test for natural language inference.
Premise: "A gymnast bends while twirling a ribbon."
Hypothesis: "A person is in a gymnastics competition."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
A: The gymnast may be practicing or twirling their ribbon anywhere else beside a gymnastics competition.
The answer is it is not possible to tell.

Q: Given the sentence "A boy sits in his seat." can we conclude that "A boy sitting down."?
Options:
- yes
- it is not possible to tell
- no
A: A boy sits in his seat means he is sitting down.
The answer is yes.

Q: Given the sentence "The man rides his bicycle up the brick wall." can we conclude that "The man can't ride a bike."?
Options:
- yes
- it is not possible to tell
- no
A:
The man can't ride a bike while he doesn't know how to rides.
The answer is no.