About: http://webisa.webdatacommons.org/301815616

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	Calcium and magnesium are found in ground water that has come in contact with certain rocks and minerals, especially limestone and gypsum.
http://www.w3.org/ns/prov#wasQuotedFrom	wellowner.org