About: http://webisa.webdatacommons.org/199938055

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	For buttons and other triggers I use the ICommand interface supplied by WPF in a similar fashion to the DelegateCommand that you linked to. (actually I use a Relay Command as defined here)
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com