About: http://webisa.webdatacommons.org/365671871

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	Video sources 507 are devices such as video cameras, VCRs, or digital devices, that create electronic signals containing the information necessary to display the type of video pictures addressed in this disclosure.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk