{
    "contact_points": [
        {
            "id": 0,
            "description": "On the hammer handle",
            "usage": " Used to grasp the hammer with the left or right arm."
        }
    ],
    "functional_points": [
        {
            "id": 0,
            "description": "On the hammer head",
            "usage": " Used to hit the block on the table."
        }
    ]
}