About: http://webisa.webdatacommons.org/423283187

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 aperture or apertures 52 that connect the layers may be circular as shown in FIG. 5, or any other suitable shape, including square, rectangular, oval, and irregularly-shaped.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com