Assertion: vernal equinox | /r/HasProperty | 12 hours long
Facets:
value: at the start of spring
type: TEMPORAL
value: in the northern hemisphere
type: LOCATION
value: —day
type: TEMPORAL
Source sentences:
text: At the start of spring—the vernal equinox—day and night are each approximately 12 hours long (with the actual time of equal day and night, in the Northern Hemisphere, occurring a few days before the vernal equinox).