'Predicates' are sometimes called 'properties', e.g., `rdf_statistics/1`. 'Instances' are sometimes called 'individuals', e..g, `rdfs_individual_of/2`.
'Predicates' are sometimes called 'properties', e.g.,
rdf_statistics/1.'Instances' are sometimes called 'individuals', e..g,
rdfs_individual_of/2.