_:c14n0 <http://example.org/vocab#p1> _:c14n1 .
_:c14n1 <http://example.org/vocab#p2> "Foo" .
_:c14n2 <http://example.org/vocab#p1> _:c14n3 .
_:c14n3 <http://example.org/vocab#p2> "Foo" .