[Q] Given the sentence "Two surfers preparing to enter the water for a competition." is it true that "The surfers have swam back to shore."?
[A] Preparing to enter the water and swimming back to shore are two different events.
The answer is no.

[Q] Can we conclude from "A man biking in front of mountains." that "A man rides on a mountain trail with his dog."?
Options:
- yes
- no
- it is not possible to tell
[A] Not every man biking up a mountain does so with his dog.
The answer is it is not possible to tell.

[Q] Premise: "A woman in glasses smiles as she looks at the back of a camera she holds up in front of her face."
Based on this premise, can we conclude that the hypothesis "A woman smiles at an image in the viewing screen of her camera." is true?
Options:
- yes
- it is not possible to tell
- no
[A] The woman holding the back of a camera in front of her face does not mean that she is smiling at an image in the viewing screen.
The answer is it is not possible to tell.