{
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      {
        "structure": "minecraft:trial_chambers",
        "weight": 1
      }
    ],
    "placement": {
    "salt": 1999,
    "spacing": 25,
    "separation": 12,
    "type": "minecraft:random_spread",
    "exclusion_zone": {
        "other_set": "ftb:exclusion_set",
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      }
  }
}