About: http://webisa.webdatacommons.org/384786993

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 may have any shape and may especially have a circular or polygonal (square, hexagonal or octagonal) cross section depending on the intended specific application.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com