_:b0 <http://example/foo-prop> "foo" .
_:b0 <http://example/nested> _:b1 .
_:b0 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://example/Foo> .
_:b0 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://example/Bar> .
_:b1 <http://example/prop> "vocab" .
