g.addEdge("is a", "Python", "Programming Language");
NanoGraphPanel gp = new NanoGraphPanel();
DebugGraphListener dgl = new DebugGraphListener(new OutputStreamWriter(System.out));
gp.getInteractionManager().addSelectionListener(dgl);
gp.setModel(g);
gp.getNanoGraph().setLayout(new CircularLayoutAlgorithm(200));
gp.getNanoGraph().setBackground(new GridBackGround());