[QUESTION] Can we conclude from "A man speaking at a conference." that "The man is speaking."?
Options:
- yes
- no
- it is not possible to tell
If someone is speaking at a conference then they must actually be speaking.
The answer is yes.

[QUESTION] If "A man and woman walking across a street." does that mean that "A couple is swimming."?
Options:
- yes
- it is not possible to tell
- no
You have to be in water to be swimming so they would not also be walking across a street.
The answer is no.

[QUESTION] Given the sentence "A female student does research on her apple laptop." can we conclude that "A lady preparing for her thesis."?
Options:
- yes
- it is not possible to tell
- no
Just because she does research does not mean it is for her thesis.
The answer is it is not possible to tell.

[QUESTION] Premise: "A woman is taking a photo of a bridge while standing on the train tracks."
Based on this premise, can we conclude that the hypothesis "A photographer is taking pictures of a bridge." is true?
Options:
- yes
- it is not possible to tell
- no
A person who is taking a photo is called a photographer.
The answer is yes.