About: http://webisa.webdatacommons.org/315713608

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	Yeah, there was a letter (famously postmarked From Hell) but there is no real proof the killer actually wrote it.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com