[ { "type": "item_group", "id": "military", "subtype": "distribution", "entries": [ { "item": "double_plutonium_core", "prob": 3 } ] }, { "type": "item_group", "id": "mil_hw", "subtype": "distribution", "entries": [ { "item": "double_plutonium_core", "prob": 3 } ] }, { "type": "item_group", "id": "helicopter", "subtype": "distribution", "entries": [ { "item": "double_plutonium_core", "prob": 5 } ] } ]