About: http://webisa.webdatacommons.org/313276240

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 result is a bifocal lens having a near viewing area integrated into a distance viewing area.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com