[
    {
        "nodeId": "node1",
        "label": "Node 1",
        "content": "Content node 1",
        "relation": "",
        "exercises": [
            {
                "questionId": "question1.1",
                "question": "Test Question 1",
                "options": {
                    "A": "Node 1 Choice A",
                    "C": "Node 2 Choice C"
                },
                "answer": "A"
            }
        ]
    },
    {
        "nodeId": "node2",
        "label": "Node 2",
        "content": "Content node 2",
        "relation": "Son",
        "fatherId": "node1",
        "exercises": [
            {
                "questionId": "question2.1",
                "question": "Test Question 2",
                "options": {
                    "A": "Node 2 Choice A",
                    "B": "Node 2 Choice B"
                },
                "answer": "A"
            }
        ]
    },
    {
        "nodeId": "node3",
        "label": "Node 3",
        "content": "Content node 3",
        "relation": "Sonson",
        "fatherId": "node2",
        "exercises": [
            {
                "questionId": "question3.1",
                "question": "Test Question 3",
                "options": {
                    "A": "Node 3 Choice A",
                    "D": "Node 3 Choice D"
                },
                "answer": "A"
            }
        ]
    },
    {
        "nodeId": "node4",
        "label": "Node 4",
        "content": "Content node 4",
        "relation": "Sonsonson",
        "fatherId": "node2",
        "exercises": [
            {
                "questionId": "question4.1",
                "question": "Test Question 4",
                "options": {
                    "A": "Node 4 Choice A",
                    "B": "Node 4 Choice B"
                },
                "answer": "A"
            }
        ]
    }
]