{
    "classifications": [
        {
            "column": "Company Name",
            "label": "primary_key",
            "confidence": 0.93,
            "reason": "96 distinct of 96 rows, no nulls, and it names the entity each row describes."
        },
        {
            "column": "Founded",
            "label": "none",
            "confidence": 0.95,
            "reason": "Year attribute with only 16 distinct values."
        },
        {
            "column": "Location",
            "label": "none",
            "confidence": 0.95,
            "reason": "Low-cardinality city attribute, not a key."
        },
        {
            "column": "Sector",
            "label": "none",
            "confidence": 0.95,
            "reason": "Categorical attribute with 39 distinct values, not a key."
        },
        {
            "column": "What it does",
            "label": "none",
            "confidence": 0.8,
            "reason": "Unique free-text description, not an identifier."
        },
        {
            "column": "Founders",
            "label": "none",
            "confidence": 0.8,
            "reason": "Descriptive names text, not an identifier, and it contains an empty value."
        },
        {
            "column": "Investor",
            "label": "none",
            "confidence": 0.9,
            "reason": "Descriptive attribute with 86 distinct values for 96 rows, so not unique."
        },
        {
            "column": "Amount",
            "label": "none",
            "confidence": 0.95,
            "reason": "Funding amount stored as text, a measure rather than a key."
        },
        {
            "column": "Stage",
            "label": "none",
            "confidence": 0.95,
            "reason": "Low-cardinality funding-stage category."
        }
    ]
}