{
    "items": [
        {
            "text": "How many distinct values does each categorical column have",
            "kind": "statistic",
            "columns": [
                "_source_file",
                "_source_system",
                "Species"
            ],
            "statistics": [
                "count_distinct"
            ],
            "group_column": null,
            "group_values": []
        }
    ]
}