[QUESTION] Given the sentence "Four bicyclists wearing yellow and orange vests are standing in front of a shack with mountains in the background." is it true that "Four bikers are in front of a shack waiting for the owner to bring them food."?
Bicyclists aren't necessarily bikers and the owner of the shack may not there to bring them food.
The answer is it is not possible to tell.

Q: If "A man and a boy set up a grill on a sunny day." does that mean that "A father and son setting up a grill on a sunny friday."?
Options:
- yes
- it is not possible to tell
- no
A: Sentence 1: A man and a boy set up a grill on a sunny day. Sentence 2: A father and son setting up a grill on a sunny friday.
The answer is it is not possible to tell.

QUESTION: If "A little boy playing some game and trying to hit the ball with a paddle." does that mean that "The boy swims in the lake."?
Options:
- yes
- it is not possible to tell
- no

Let's solve it slowly: The boy can either be swimming or playing a game with the ball and paddle.
The answer is no.

[QUESTION] Premise: "A boy jumps high above his skateboard near a sign."
Hypothesis: "It is a pretty day."
Do we know that the hypothesis entailed by the premise?
Jumps his skateboard does not imply it is a pretty day.
The answer is it is not possible to tell.

Q: Given the sentence "A group of people watch a vintage steam locomotive (with coal car) on a track." can we conclude that "Separated by a chain link fence."?
Options:
- yes
- it is not possible to tell
- no
A: The locomotive was built in the 1800s and can still run.
The answer is it is not possible to tell.

[QUESTION] Premise: "A dog in a life jacket sitting on a boat with a man in the cockpit."
Hypothesis: "A dog and a man are on a boat."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
A dog sitting on a boat with a man means a dog and a man are on a boat.
The answer is yes.