[QUESTION] Premise: "A man in a white jacket is on top of a roof sanding it down while standing on a wooden ledge."
Hypothesis: "A man in a white jacket standing on top of a roof sanding it down while standing on the edge of a wooden ledge outside."
Do we know that the hypothesis entailed by the premise?
If a man is on top of a roof he is also outside; if he is standing on a wooden ledge he is also on the edge of the wooden ledge.
The answer is yes.

[QUESTION] Given the sentence "A young girl is smiling while swinging." is it true that "A child swings at the park while her mother looks on."?
A young girl swinging does not mean her mother looks on.
The answer is it is not possible to tell.

[QUESTION] Given the sentence "A man without a shirt is working on the roof of a house." is it true that "A shirtless man is hammering shingles on the roof a house."?
Working on the roof of a house does not always mean hammering shingles.
The answer is it is not possible to tell.

[QUESTION] Test for natural language inference.
Premise: "A young businessman walking down the street while a black bird flies in front of him."
Hypothesis: "A businessman is eating a bird."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
A Bird can not fly while the businessman is eating it.
The answer is no.