About: http://webisa.webdatacommons.org/211186874

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	Check my previous post, I suspect there is a problem with your SQL and so the query() method is returning false.
http://www.w3.org/ns/prov#wasQuotedFrom	sitepoint.com