test_output

Failed example:
    print triples_to_n3(cg2-cg1)
Expected:
    <http://example.org> <http://example.org/ns#rel> <http://example.org/b> .
    <http://example.org> <http://example.org/ns#rel> _:cb1634787881 .
    _:cb1634787881 <http://example.org/ns#label> "B" .
Got:
    <http://example.org> <http://example.org/ns#rel> <http://example.org/b> .
    <http://example.org> <http://example.org/ns#rel> _:cb8496374808470151721 .
    _:cb8496374808470151721 <http://example.org/ns#label> "B" .