About: http://webisa.webdatacommons.org/8487504

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 shape of the apertures may be circular, diamond or rectangular and the apertures may be arranged in rows, circles or other patterns.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk