About: http://webisa.webdatacommons.org/180539173

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 trenches may be straight (as in the preferred embodiments) or may be meandering, corrugated, or other shapes and may even vary their shapes on differing vertical levels.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com