About: http://webisa.webdatacommons.org/326723369

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 gravel holds the perforated pipe in place and prevents leaves and other organic matter from clogging the slots in the pipe.
http://www.w3.org/ns/prov#wasQuotedFrom	wisegeek.com