About: http://webisa.webdatacommons.org/283942032

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	Thus, as concerns for example the prevention of spam, any computer that wants to send an e-mail has to produce such a proof-of-work before the receiver accepts the e-mail from this computer.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com