Assertion: vertical skateboarding | /r/CapableOf | develop eight-foot aerials
Facets:
value: into the mid 80s
type: TEMPORAL
Source sentences:
text: As vertical skateboarding developed into the mid 80s, eight-foot aerials (over the top of the ten-foot-tall ramp) and other dazzling maneuvers catalyzed the third wave of skateboarding’s popularity.