About: http://webisa.webdatacommons.org/409499324

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	I have not tried 2.3 using this guide so there is a chance that they changed the layout again with opencv. Have you double checked your includes and linker settings?
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com