About: http://webisa.webdatacommons.org/185333072

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 think you just flag one of them and say this user is a content-free question spawn, and the mods will go find the others and confirm the pattern.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com