About: http://webisa.webdatacommons.org/427246440

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	In order to check if this is the reason, try accessing the site without the vhost i.e. localhost/drupal and see if this works.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com