Assertion: skateboard | /r/HasProperty | revived in mid-1970
Facets:
value: after the introduction of the kicktail
type: TEMPORAL
Source sentences:
text: Skateboards were revived in the mid-1970s after the development of the faster and more-maneuverable polyurethane wheel and the introduction of the kicktail, the raised back end of the board that makes kickturns possible.