| http://www.w3.org/ns/prov#value | - Although iron has always been one of the most abundant elements in nature, its usage was slow to evolve due to the fact that the early ironworkers did not understand the necessity to reduce the carbon content of the iron by remelting a second time, and that hammering the ingots would expel the carbon and other impurities to produce the malleable iron we now know.
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