About: http://webisa.webdatacommons.org/239001594

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 am just a bit disturbed that the what() function is mostly useless, I wonder why I even inherit from std::exception at all.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com