Q: Test for natural language inference.
Premise: "Workers in reflective clothing with shovels on a train track."
Hypothesis: "Workers are riding on a train."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
A: Workers cannot be on a train track while riding on a train at the same time.
The answer is no.

Q: Given the sentence "A parade drummer playing for the crowd." can we conclude that "An old lady plays the organ in a church."?
Options:
- yes
- it is not possible to tell
- no
A: The old lady either is a drummer playing for the crowd or plays the organ. She physically cannot do both simultaneously.
The answer is no.

Q: Premise: "A man rides a skateboard down the railing of a staircase in front of a closed storefront."
Hypothesis: "With three people watching him."
Do we know that the hypothesis entailed by the premise?
A: This was the man's first attempt at grinding a railing on his skateboard and the spectators were impressed.
The answer is it is not possible to tell.

Q: Given the sentence "A group of people walking down the street." can we conclude that "A pickle riding a cat."?
Options:
- yes
- it is not possible to tell
- no
A:
A pickle and cat do not constitute a group of people. One cannot walk while riding something.
The answer is no.