请以json格式输出关于春季的三个活动名称及其日期，每项活动应包含一个标题、开始日期和结束日期。
user
{
  "spring_activities": [
    {
      "title": "春季花展",
      "start_date": "2023-03-20",
      "end_date": "2023-03-25"
    },
    {
      "title": "植树节庆典",
      "start_date": "2023-03-12",
      "end_date": "2023-03-12"
    },
    {
      "title": "春日文体节",
      "start_date": "2023-04-05",
      "end_date": "2023-04-10"
    }
  ]
}
assistant