Prefix( : = <http://example.org/> )

Ontology(

Declaration( ObjectProperty( :hasFather ) )

Declaration( ObjectProperty( :hasMother ) )

Declaration( ObjectProperty( :hasChild ) )

DisjointObjectProperties( :hasFather :hasMother :hasChild )

ObjectPropertyAssertion( :hasFather :Stewie :Peter )

ObjectPropertyAssertion( :hasMother :Stewie :Lois )

ObjectPropertyAssertion( :hasChild :Stewie :StewieJr )

)