Assertion: sofa's design | /r/CapableOf | gain steam
Facets:
value: in the 1960s
type: TEMPORAL
value: in 70s
type: TEMPORAL
Source sentences:
text: Postmodern design, intersecting the Pop art movement, gained steam in the 1960s and 70s, promoted in the 80s by groups such as the Italy-based Memphis movement.