About: http://webisa.webdatacommons.org/129275373

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	there is no such a thing as real undo send in gmail, what gmail does is delays sending for a few seconds (5 to 30 depending on your settings) so it gives you a chance to undo your action if you spot a mistake quickly enough.
http://www.w3.org/ns/prov#wasQuotedFrom	superuser.com