About: http://webisa.webdatacommons.org/9303119

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	A number of processes have also been developed for a chemical water softening of waters which contain hardness ions such as calcium and magnesium.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr