{
    "items": [
        {
            "text": "total number of records",
            "kind": "other",
            "columns": [],
            "statistics": [],
            "group_column": null,
            "group_values": []
        },
        {
            "text": "how many of them belong to the versicolor species",
            "kind": "group",
            "columns": [],
            "statistics": [],
            "group_column": "species",
            "group_values": [
                "versicolor"
            ]
        }
    ]
}