About: http://webisa.webdatacommons.org/183193824

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	Not sure that Wordpress can do that but when things start getting overly complex for Wordpress next open source choice is Drupal, and a great candidate to easily solve the sort of problem you are describing.
http://www.w3.org/ns/prov#wasQuotedFrom	sitepoint.com