PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX owl: <http://www.w3.org/2002/07/owl#>  
PREFIX : <http://example.org/test#>

SELECT * 
WHERE { ?C rdfs:subClassOf [
       a owl:Restriction ;
       owl:onProperty :hasChild ;
       owl:someValuesFrom owl:Thing ] . 
}
