Grey (de) duc de Kent

{
  "field": {
    "tincture": {
      "name": "argent",
      "category": "metal"
    },
    "partition": "fascé",
    "sub_fields": [
      {
        "tincture": {
          "name": "argent",
          "category": "metal"
        }
      },
      {
        "tincture": {
          "name": "azur",
          "category": "colour"
        }
      }
    ]
  },
  "is_compound": true
}