{
  "source_groups": {
    "vendor_release": [
      "u1",
      "u2",
      "u3",
      "u4"
    ],
    "independent_test": [
      "u5",
      "u6"
    ],
    "customer_record": [
      "u7"
    ],
    "paid_placement": [
      "u8"
    ]
  },
  "urls": 8,
  "provenance_groups": 4,
  "independent_primary_observations": 2,
  "claim_support_labels": [
    "supports",
    "partial",
    "unsupported",
    "supports"
  ],
  "full_support": 2,
  "claims": 4
}