About: http://webisa.webdatacommons.org/15575894

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	They can have any shape and can in particular be circular or polygonal (square, hexagonal or octagonal) in cross section, according to the specific application envisaged.
http://www.w3.org/ns/prov#wasQuotedFrom	sumobrain.com