Assertion: basic unit | /r/HasProperty | 1 meter
Facets:
value: on each side
type: LOCATION
Source sentences:
text: Area is length by length, so the basic unit of area is a square that is 1 meter on each side, in other words one square meter.
text: Volume is length by length by length, so the basic unit of volume is a cube that is 1 meter on each side, in other words one cubic meter.