About: http://webisa.webdatacommons.org/137778239

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	The other option is to use some sort of challenge - response (for example CAPTCHAs or one-time tokens).
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com