A man and a woman does not necessarily imply they are couple and the fact that they are riding bikes on a street does not necessarily mean that they are riding to the supermarket.
The question and answer are below.
Premise: "A man and a woman are riding bikes on a street."
Hypothesis: "The couple is riding to the supermarket."
Do we know that the hypothesis entailed by the premise?
it is not possible to tell

*****

The man that is shaving his face is not implied to being sad.
The question and answer are below.
Given the sentence "A man in a blue shirt is shaving his face." can we conclude that "A sad man in a blue shirt is shaving his face."?
Options:
- yes
- it is not possible to tell
- no
it is not possible to tell

*****

A surfer riding a wave cannot be a priest conducting Mass.
The question and answer are below.
Given the sentence "A surfer in all black is riding a wave." is it true that "A priest conducts mass."?
no

*****

A guy and a girl make up two people. Posing for the camera is another way of saying posing for a picture.
The question and answer are below.
Given the sentence "A guy with a toboggan and a girl pose for the camera." is it true that "Two people pose for a picture."?
yes

*****