org-test.n3

@prefix org: <http://www.w3.org/ns/org#> .
@prefix nary: <http://gallows.inf.ed.ac.uk/schema/n-ary#> .
@prefix ex: <http://example.org/> .

ex:president a nary:BinaryRelation ;
    nary:reifiedType org:Membership ;
    nary:subjectPredicate org:organisation ;
    nary:objectPredicate org:member ;
    nary:arg [
        nary:predicate org:role ;
        nary:object ex:presidentRole
    ] .

ex:org ex:president ex:alice .