{
    "classifications": [
        {
            "column": "Company Name",
            "role": "identifier",
            "confidence": 0.8,
            "reason": "Unique per row (96 distinct of 96); identifies each company"
        },
        {
            "column": "Founded",
            "role": "dimension",
            "confidence": 0.95,
            "reason": "Year; used to group/slice"
        },
        {
            "column": "Location",
            "role": "dimension",
            "confidence": 0.97,
            "reason": "Low-cardinality city category"
        },
        {
            "column": "Sector",
            "role": "dimension",
            "confidence": 0.97,
            "reason": "Category label with 39 distinct values"
        },
        {
            "column": "What it does",
            "role": "attribute",
            "confidence": 0.97,
            "reason": "Free-form descriptive text, unique per row"
        },
        {
            "column": "Founders",
            "role": "attribute",
            "confidence": 0.93,
            "reason": "Names of people, descriptive text displayed"
        },
        {
            "column": "Investor",
            "role": "attribute",
            "confidence": 0.7,
            "reason": "Free-form investor names, often multiple per cell; not cleanly groupable"
        },
        {
            "column": "Amount",
            "role": "measure",
            "confidence": 0.88,
            "reason": "Funding amount in dollars stored as text; to be aggregated after parsing"
        },
        {
            "column": "Stage",
            "role": "dimension",
            "confidence": 0.96,
            "reason": "Funding stage category with 11 distinct values"
        }
    ]
}