Assertion: school bus's design | /r/AtLocation | use
Facets:
value: as an emergency exit
type: PURPOSE
Source sentences:
text: As a horse-drawn wagon, the school car was fitted with a rear entrance door (intended to avoid startling the horses while loading or unloading passengers); over a century later, the design remains in use (as an emergency exit).
text: In modified form, the design remains in use today.