Q: Premise: "A man riding on the back of a trash truck."
Hypothesis: "The man is a city sanitation employee."
Do we know that the hypothesis entailed by the premise?
A: Sentence one states the man is riding in the back of a trash truck. Just because he is a sanitation employee doesn't mean he rides in the back of a trash truck.
The answer is it is not possible to tell.

Q: Test for natural language inference.
Premise: "Two men are bike racing."
Hypothesis: "And the man in front is looking behind at the other rider."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
A: One guy looks back to see if he is winning the bike race.
The answer is it is not possible to tell.

Q: Can we conclude from "Woman in a purple sweater standing out on a balcony overlooking a side street." that "A woman is wearing a sweater."?
Options:
- yes
- no
- it is not possible to tell
A: A woman wearing a purple sweater is overlooking on a balcony.
The answer is yes.

Q: Premise: "Man offers a food sample to passerby."
Hypothesis: "Man offering a bit of food for a stranger."
Do we know that the hypothesis entailed by the premise?
A:
The man offering food could be offering food to someone he knows and not a stranger.
The answer is it is not possible to tell.