_:node1 <http://example.org/#q> <http://example.org/#r> .
_:node1 <http://example.org/#s> <http://example.org/#t> .
<http://example.org/#Gamma> <http://example.org/#p> _:node1 .
_:node2 <http://example.org/#q> <http://example.org/#r> .
<http://example.org/#Delta> <http://example.org/#p> _:node2 .
<http://example.org/#Epsilon> <http://example.org/#p> "q" .