About: http://webisa.webdatacommons.org/2080743

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	You will need to decode the signed request he is passed to your app to see if the user has added the app yet or not.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com