prefix : <http://example.org/>
prefix xsd: <http://www.w3.org/2001/XMLSchema#>

:a :name       "Alice" ;
   :birthdate  "1990-05-02"^^xsd:date ;
   :enrolledIn :cs101 ;
   :knows      :b, :c .

:b :name "Bob", "Robert";
   :knows :c, :a .

:c :name "Charlie" ;
   :knows :a, :b .

:cs101 :name "Computer Science" ;
       :homePage <http://cs.example.org> .
