About: http://webisa.webdatacommons.org/281481132

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 issuing body may be the conferencing system itself or an third party. [0223] If a digital certificate is present and valid, the system will next inquire whether or not the user is a new user or a repeat user 440.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk