{
  "audiences": [
    {
      "id": "beginners",
      "slides": 3,
      "goal": "介绍社区课程、材料与报名准备"
    },
    {
      "id": "volunteers",
      "slides": 4,
      "goal": "说明场地、设备清单与值班分工"
    }
  ],
  "facts": {
    "minutes": 60,
    "devices": 12,
    "volunteers": 4
  }
}