Assertion: slide projector | /r/CapableOf | come into widespread household use
Facets:
value: in the 1950s
type: TEMPORAL
Source sentences:
text: Slide projectors were first created in the late 1800s and came into widespread household use in the 1950s.
text: Slide projectors were first created in the late 1800s and came into widespread household use in the 1950s.