About: http://webisa.webdatacommons.org/240274040

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	Hard water may be defined as an aqueous solution containing from 100-20,000 parts per million polyvalent metal ions such as calcium and/or magnesium ions.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es