Why does 'Menu' Contain Old Junk?

[PeteTheBloke]

When I request menu from

https://api.betfair.com/exchange/bet...tion/menu.json

I get a lot of junk (in with the valid stuff) e.g.

{
              "type": "EVENT",
              "name": "Busan",
              "id": "28831140",
              "countryCode": "KR",
              "children": [
                {
                  "type": "MARKET",
                  "name": "Busan",
                  "id": "1.146354737",
                  "exchangeId": "1",
                  "marketType": "RACE_WIN_DIST",
                  "marketStartTime": "2018-08-04T14:00:00.000Z",
                  "numberOfWinners": 1
                }
              ]
            }

Is there something extra I should do, to filter it out?