{
    "tile_processors": [
      {
        "type": "placeholder",
        "target": "OBJECTIVE",
        "levels": [
          {
            "level": 0,
            "probability": 0.0,
            "success": {
              "minecraft:air": 1
            },
            "failure": {
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        ]
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      {
        "type": "placeholder",
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            "success": {
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