About: http://webisa.webdatacommons.org/213679801

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	A variety of methods and apparatus including different types of perforating screens have been developed over the years since Zimmerli's invention for making apertured films.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca