{
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "items": {
      "type": "array",
      "items": {
        "type": "object",
        "additionalProperties": false,
        "properties": {
          "shot": {"type": "string"},
          "prev": {"type": ["string", "null"]},
          "reason_ko": {"type": "string"},
          "usage_en": {"type": "string"}
        },
        "required": ["shot", "prev", "reason_ko", "usage_en"]
      }
    }
  },
  "required": ["items"]
}