Assertion: ore | /r/HasProperty | extracted
Facets:
value: from shallow depths
type: OTHER
value: from remnants of former abandoned mines
type: LOCATION
value: primarily
type: DEGREE
Source sentences:
text: Initially, many metals were obtained through open-pit mining, and ore was primarily extracted from shallow depths, rather than through deep mine shafts.
text: Ores were extracted only from shallow depths or from remnants of former abandoned mines.