Test for natural language inference.
Premise: "Firetrucks and other emergency vehicles are responding to an emergency."
Hypothesis: "The siren is on."
Is the hypothesis entailed by the premise?
Options:
- yes
- no
- it is not possible to tell
Let's solve step-by-step:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
The firetrucks and other emergency vehicles are responding to an emergency but that doesn't mean the siren is on. The answer is it is not possible to tell.