About: http://webisa.webdatacommons.org/156100619

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 tank body 1 biologically by the action of bacteria living in a filtering material such as gravel.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com