Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Engelsberg Ironworks' has mentioned 'Ore' in the following places:
Occurrence Sentence Text Source
The local peasants both mined the ore and produced the iron using primitive furnaces.
Local inhabitants began mining ore and smelting in the 12th century as a supplement to agricultural activities.
The present blast furnace, built in 1778-1779 along with an ore crusher and a large charcoal store, incorporated a number of then-contemporary technological innovations.