Assertion: city | /r/Desires | their installation
Facets:
value: on buildings
type: LOCATION
value: in the 1800s
type: TEMPORAL
value: to prevent the need
type: PURPOSE
Source sentences:
text: In the 1800s, the city required their installation on buildings higher than six stories to prevent the need for excessively high water pressures at lower elevations, which could break municipal water pipes.