[
      {
        "weight": 5,
        "reference": "the_vault:vault/rooms/challenge/crystal_caves"
      },
      {
        "weight": 2,
        "reference": "the_vault:vault/rooms/challenge/dragon"
      },
      {
        "weight": 10,
        "reference": "the_vault:vault/rooms/challenge/village"
      },
      {
        "weight": 10,
        "reference": "the_vault:vault/rooms/challenge/wildwest"
      },
      {
        "weight": 6,
        "reference": "the_vault:vault/rooms/challenge/factory"
      },
      {
        "weight": 1,
        "reference": "the_vault:vault/rooms/challenge/digsite"
      },
      {
        "weight": 10,
        "reference": "the_vault:vault/rooms/challenge/x-mark"
      }
]