About: http://webisa.webdatacommons.org/201465851

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	Aside from slots other grading means can be employed such as small perforations, louvers, vertical or straight horizontal slots and other means known in the art.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com