Assertion: foundry | /r/CapableOf | begin producing ductile
Facets:
value: in the 1950s
type: TEMPORAL
value: with the discovery of ductile iron
type: OTHER
Source sentences:
text: With the discovery of ductile iron, the foundry began producing ductile in the 1950s, using open ladle treatments or the Gazal porous plug process.