About: http://webisa.webdatacommons.org/342525206

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	It has always been the case that certain types of filters or separation mediums are more efficient at removing certain types of impurities in the water.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca