About: http://webisa.webdatacommons.org/29208307

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	foreach ($var as $k) if ($k !== true) $this->error('Lookup table contains value other than true');
http://www.w3.org/ns/prov#wasQuotedFrom	bitbucket.org