About: http://webisa.webdatacommons.org/61399077

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 present invention avoids the necessity of removing soil, silt, stones and other particulate matter from within the sewer and thus avoids the expense and cost associated with such filters.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com