{
  "kind": "synthetic_teaching",
  "sessions": {
    "S1": {
      "name": "周六上午合成活动",
      "capacity": 1
    },
    "S2": {
      "name": "周日上午合成活动",
      "capacity": 1
    }
  },
  "people": {
    "P1": "合成人甲",
    "P2": "合成人乙",
    "P3": "合成人丙",
    "P4": "合成人丁"
  },
  "registrations": {
    "R11": {
      "session_id": "S1",
      "person_id": "P1",
      "status": "booked"
    },
    "R21": {
      "session_id": "S2",
      "person_id": "P1",
      "status": "booked"
    }
  },
  "waitlists": {
    "S1": [
      "P2",
      "P3"
    ],
    "S2": [
      "P2",
      "P4"
    ]
  }
}