Assertion: wheel drive | /r/CapableOf | merge into the mainstream
Facets:
value: during the 1930s
type: TEMPORAL
Source sentences:
text: Font-wheel drive surfaced during the 1900s on various prototypes, and it merged into the mainstream during the 1930s when French automaker Citroen released the Traction Avant (which means, literally, front-wheel drive).