About: http://webisa.webdatacommons.org/271281367

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	Categories are a taxonomy and yet is_tax() only returns true for custom taxonomies and not for tags and categories.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.org