About: http://webisa.webdatacommons.org/155267708

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	The ion exchange material is preferably a resin containing sodium or potassium ions that replace hard ions such as calcium and magnesium ions from the feed liquid.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es