About: http://webisa.webdatacommons.org/272005269

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	While a handheld calculator would be out of the question, Sharp and other companies were selling _desktop_ electronic calculators since the late 60???s.
http://www.w3.org/ns/prov#wasQuotedFrom	pjmedia.com