{
    "classifications": [
        {
            "column": "Name",
            "label": "session_entity",
            "confidence": 0.9,
            "reason": "Player whose matches repeat across rows, giving each a timeline"
        },
        {
            "column": "Date",
            "label": "session_time_axis",
            "confidence": 0.9,
            "reason": "Match date orders a player's activity"
        },
        {
            "column": "Tournament",
            "label": "session_container",
            "confidence": 0.55,
            "reason": "A tournament edition is a bounded episode grouping a player's matches"
        },
        {
            "column": "Surface",
            "label": "none",
            "confidence": 0.9,
            "reason": "Categorical attribute of the court"
        },
        {
            "column": "Rd",
            "label": "none",
            "confidence": 0.6,
            "reason": "Round label is categorical; it orders matches within a tournament but is not a clean ordinal or timestamp"
        },
        {
            "column": "Rk",
            "label": "none",
            "confidence": 0.9,
            "reason": "Player ranking metric"
        },
        {
            "column": "vRk",
            "label": "none",
            "confidence": 0.9,
            "reason": "Opponent ranking metric"
        },
        {
            "column": "against",
            "label": "none",
            "confidence": 0.95,
            "reason": "Constant empty column"
        },
        {
            "column": "Score",
            "label": "none",
            "confidence": 0.9,
            "reason": "Match score outcome"
        },
        {
            "column": "DR",
            "label": "none",
            "confidence": 0.9,
            "reason": "Dominance ratio statistic"
        },
        {
            "column": "TPW",
            "label": "none",
            "confidence": 0.9,
            "reason": "Total points won percentage"
        },
        {
            "column": "RPW",
            "label": "none",
            "confidence": 0.9,
            "reason": "Return points won percentage"
        },
        {
            "column": "vA%",
            "label": "none",
            "confidence": 0.9,
            "reason": "Opponent ace percentage statistic"
        },
        {
            "column": "v1st%",
            "label": "none",
            "confidence": 0.9,
            "reason": "Statistic on opponent first serve"
        },
        {
            "column": "v2nd%",
            "label": "none",
            "confidence": 0.9,
            "reason": "Statistic on opponent second serve"
        },
        {
            "column": "BPCnv",
            "label": "none",
            "confidence": 0.9,
            "reason": "Break point conversion statistic"
        },
        {
            "column": "Time",
            "label": "none",
            "confidence": 0.85,
            "reason": "Match duration, not an event timestamp"
        }
    ]
}