[
  {
    "type": "item_group",
    "id": "science",
    "ammo": 50,
    "magazine": 100,
    "items": [
      { "group": "museum_primitive", "prob": 100 },
      [ "pointy_stick", 50 ],
      [ "throwing_stick", 50 ],
      [ "spear_stone", 50 ]
    ]
  }
]
