Assertion: ore's silver | /r/HasProperty | separated
Facets:
value: from lead
type: OTHER
Source sentences:
text: While slag heaps found in Asia Minor and on the islands of the Aegean Sea indicate that silver was being separated from lead as early as the 4th millennium BC, and one of the earliest silver extraction centres in Europe was Sardinia in the early Chalcolithic period, these techniques did not spread widely until later, when it spread throughout the region and beyond.