About: http://webisa.webdatacommons.org/418011804

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	If you are just doing this as a one-off your solution is fine - but if you are allowing users to do this via a form of some kind then you have a security flaw called SQL Injection.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com