About: http://webisa.webdatacommons.org/15016795

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	An inner cast carbonaceous media having a nominal porosity in the range of 1 to 25 microns is selected to reduce contaminants such as lead and other heavy metals.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com