About: http://webisa.webdatacommons.org/146671686

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	Both filter types area generally stable,making full use of the natural purification processof harvested surface water and do not requirechemicals.
http://www.w3.org/ns/prov#wasQuotedFrom	slideshare.net