Any person can wear a white apron and not be a chef. Some people have stone ovens that are not commercially used.
The question and answer are below.
Premise: "A guy in a white apron is cooking a pizza in a stone oven."
Hypothesis: "A chef is cooking pizza for his customers."
Do we know that the hypothesis entailed by the premise?
it is not possible to tell

Two people in a breakdance battle are not necessarily performing for a crowd.
The question and answer are below.
Premise: "You have two guys in a breakdance battle and one of them is doing a move called the hollow back."
Based on this premise, can we conclude that the hypothesis "The guys are performing for a crowd." is true?
Options:
- yes
- it is not possible to tell
- no
it is not possible to tell

Because firemen are looking up at a building doesn't imply the building is engulfed in flames.
The question and answer are below.
If "Firemen in uniform standing on a wet street looking up at a building." does that mean that "Firemen in uniform standing on a wet street looking up at a building that is engulfed in flames."?
Options:
- yes
- it is not possible to tell
- no
it is not possible to tell