About: http://webisa.webdatacommons.org/233290176

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 cross section may be oval, square, rectangular, angular, or other suitable shape, instead of the cylindrical form illustrated.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au