About: http://webisa.webdatacommons.org/257243143

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	Well, I do not know if there is a limit for deleting them (after someone has replied to the thread after the post, it can not be done anymore) but there surely is for editing them.
http://www.w3.org/ns/prov#wasQuotedFrom	omniglot.com