About: http://webisa.webdatacommons.org/246941264

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	While these four projected portions 321, 322 and 323, 324 are semicircular in this embodiment, the present invention is not limited thereto and they may be square, rectangular, elliptic, triangular and other shapes.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com