About: http://webisa.webdatacommons.org/150284082

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	Water is a great solvent for calcium and magnesium, so if the minerals are present in the soil around a water-supply well, the hard water may be delivered to homes.
http://www.w3.org/ns/prov#wasQuotedFrom	usgs.gov