About: http://webisa.webdatacommons.org/29582979

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	Any information that you do not want people to see is a security risk, my advice would be to never use default 404's not only do they look ugly and provide very little functionality but they can as you are asking cause security concerns.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com