code: def add_used_entity(self, entity_uri):
          
          entity_o = URIRef(entity_uri)
          self.prov_g.add((entity_o, RDF.type, self.prov.Entity))
          self.prov_g.add((self.activity, self.prov.used, entity_o))
docs: Add the provided URI as a used entity by the logged activity