Assertion: skateboarding | /r/HasProperty | born in late 1940s
Facets:
value: probably
type: DEGREE
value: sometime
type: TEMPORAL
Source sentences:
text: Skateboarding, as we know it, was probably born sometime in the late 1940s, or early 1950s,[citation needed] when surfers in California wanted something to do when the waves were flat.
text: Skateboarding, as we know it, was probably born sometime in the late 1940s, or early 1950s, when surfers in California wanted something to do when the waves were flat.