avocado> var Graph = require("graph").Graph;

avocado> g = new Graph("vertices", "edges");

avocado> v1 = g.addVertex();
Vertex(<graph>, "153246:2310672")

avocado> e1 = g.addEdge(v, v, "self");
Edge(<graph>, "3999653:7360858")

avocado> e1.getLabel();
knows