{
  "graph": {
    "version": "1.0",
    "directed": true,
    "nodes": [
      { "id": "Node1" },
      { "id": "Node2" },
      { "id": "Node3" },
      { "id": "Node4" }
    ],
    "edges": [
      { "between": [ "Node1", "Node1" ] },
      { "between": [ "Node1", "Node2" ] },
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      { "between": [ "Node3", "Node4" ] },
      { "between": [ "Node4", "Node3" ] },
      { "between": [ "Node4", "Node1" ] }
    ]
  }
}