About: http://webisa.webdatacommons.org/250083847

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Lighter than both titanium and aluminum, magnesium is either extracted from the ocean or recovered from minerals such as dolomite or magnetite.
http://www.w3.org/ns/prov#wasQuotedFrom	advancedoptometry.com