About: http://webisa.webdatacommons.org/321618866

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	Deleting a message is a good example: for a spool file ??? the message must be removed, and then the whole file after the deleted message must be rewritten with the deleted message removed, which is a very expensive operation.
http://www.w3.org/ns/prov#wasQuotedFrom	fiid.net