[
  {
    "weight": 2,
    "pool": [
      {
        "weight": 1,
        "value": {
          "template": "the_vault:vault/decor/village/catacomb_3a",
          "palettes": [ "the_vault:village/spawner_settings" ]
        }
      },
      {
        "weight": 1,
        "value": {
          "template": "the_vault:vault/decor/village/catacomb_3b",
          "palettes": [ "the_vault:village/spawner_settings" ]
        }
      }
    ]
  }
]