{
  "version": 1,
  "tasks": [
    { "id": "A", "name": "会場を確定する", "duration": 2, "predecessors": "" },
    { "id": "B", "name": "配置・動線を決める", "duration": 3, "predecessors": "A" },
    { "id": "C", "name": "告知文と出展者案内を整える", "duration": 4, "predecessors": "A" },
    { "id": "D", "name": "備品を手配する", "duration": 2, "predecessors": "B" },
    { "id": "E", "name": "会場と備品を最終確認する", "duration": 1, "predecessors": "C, D" }
  ]
}