Assertion: magnesium sulfate's magnesium | /r/HasProperty | extracted
Facets:
value: from the minerals dolomite
type: OTHER
value: commonly
type: DEGREE
value: from seawater
type: LOCATION
Source sentences:
text: Magnesium is commonly extracted from seawater, where it is the third most common component.
text: Today, magnesium can be extracted from the minerals dolomite (CaCO 3 ·MgCO 3 ) and carnallite (KCl·MgCl 2 ·6H 2 O), but is most often obtained from seawater.