About: http://webisa.webdatacommons.org/126428413

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	Most browsers should allow you to see the POST request that is being made to the server (under the 'Network' tab on Chrome) and see if the there is any problem calling the PHP script.
http://www.w3.org/ns/prov#wasQuotedFrom	sitepoint.com