Assertion: blast furnace | /r/CapableOf | develop in europe
Facets:
value: from small furnaces
type: OTHER
value: gradually
type: MANNER
value: over the centuries
type: TEMPORAL
Source sentences:
text: In Europe, the blast furnace developed gradually over the centuries from small furnaces operated by the Romans, in which charcoal was used for reducing ore to a semisolid mass of iron containing a relatively small amount of carbon and slag.