About: http://webisa.webdatacommons.org/209119997

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 slate and stylus is the oldest device used to produce braille, an invention of Charles Barbier.
http://www.w3.org/ns/prov#wasQuotedFrom	brl.org