@prefix :  <http://example.org/test#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix owl:  <http://www.w3.org/2002/07/owl#> .

_:sparql-dl-08 a owl:Ontology .

:p rdf:type owl:ObjectProperty .
:q rdf:type owl:ObjectProperty .

:a rdf:type owl:NamedIndividual .
:b rdf:type owl:NamedIndividual .
:c rdf:type owl:NamedIndividual .
:d rdf:type owl:NamedIndividual .
:x rdf:type owl:NamedIndividual .

:a :p :b.
:b :q :c.
:b :q :d.

:x :q :x .

:b owl:sameAs :x .