About: http://webisa.webdatacommons.org/295961421

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	Also included are materials such as magnesium and potassium, which are present in practically unlimited quantities in the oceans and may be considered essentially as renewable resources.
http://www.w3.org/ns/prov#wasQuotedFrom	usgs.gov