PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • 22> It seems straightforward, but it can fail if is_author() is true, but the queried object is something other than an author, which could occur for more complex queries. like tax + author, etc.
http://www.w3.org/ns/prov#wasQuotedFrom
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