About: http://webisa.webdatacommons.org/268503428

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	But as you can see the Notice is triggered and the is_array() check fails (as can be seen, it is impossible for the variable to be anything other than an array).
http://www.w3.org/ns/prov#wasQuotedFrom	php.net