@prefix ex: <http://www.example.org/> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .

ex:Film rdf:type rdfs:class .
ex:Person rdf:type rdfs:class .
ex:Actor rdf:type rdfs:class .
ex:PrincipalActior rdf:type rdfs:class .
ex:Director rdf:type rdfs:class .
ex:CreaticeWork rdf:type rdfs:class .

ex:Actor rdfs:subClassOf ex:Person .
ex:PrincipalActor rdfs:subClassOf ex:Actor .

ex:hasRoleIn rdf:type rdf:Property .
ex:hasRoleIn rdfs:domain ex:Actor .
ex:hasRoleIn rdfs:domain ex:Director .
ex:hasRoleIn rdfs:range ex:Film .

ex:hasPrincipalRoleIn rdfs:subPropertyOf ex:hasRoleIn .

ex:starring a rdf:Property ;
rdfs:domain ex:Director;
rdfs:rand ex:Film .

ex:Titanic rdf:type ex:Film .
ex:Leonardo_DiCaprio rdf:type ex:Actor .
ex:Kate_Winslet rdf:type ex:Actor .