{
  "description": "Teaching dataset for qualifying sources",
  "scale": "1 to 5",
  "formula": "confidence = average(method, recency, proximity, independence) × 20",
  "sources": [
    {
      "name": "Sector authority",
      "method": 5,
      "recency": 4,
      "proximity": 5,
      "independence": 5,
      "confidence": 95
    },
    {
      "name": "Annual report of a market player",
      "method": 4,
      "recency": 5,
      "proximity": 4,
      "independence": 2,
      "confidence": 75
    },
    {
      "name": "Specialist media",
      "method": 3,
      "recency": 4,
      "proximity": 3,
      "independence": 3,
      "confidence": 65
    },
    {
      "name": "Vendor study",
      "method": 2,
      "recency": 4,
      "proximity": 2,
      "independence": 1,
      "confidence": 45
    }
  ]
}