About: http://webisa.webdatacommons.org/62490921

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	Second, if $obj is an object, you do not use [] to access it is values, you use ->.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com