{
  "fields": [{"id":"_id","type":"int"},{"id":"開催日時","type":"text"},{"id":"参加者数","type":"text"}],
  "records": [
    [1,"平成28年8月6日","18名"],
    [2,"平成29年8月5日","9名"],
    [3,"平成30年8月18日","3名"],
    [4,"令和2年2月22日","6名"]
]}