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

_:1 a owl:Ontology .
:p a owl:DatatypeProperty .
:s1 :p 1 .
:s2 :p 2 .
:s3 :p 3 .
:s4 :p 4 .