{
  "id": "a3eb592daaf6",
  "levels": 1,
  "challenges": [
    {
      "type": "cards",
      "pictures": [
        "milk1.jpg",
        "milk2.jpg",
        "milk3.jpg"
      ],
      "formInTargetLanguage": "foo",
      "meaningInSourceLanguage": "la leche",
      "id": "9c25158b7571",
      "priority": 0,
      "group": "7494acaa2312"
    },
    {
      "type": "shortInput",
      "pictures": [
        "milk1.jpg",
        "milk2.jpg",
        "milk3.jpg"
      ],
      "formInTargetLanguage": [
        "foo"
      ],
      "phrase": [
        {
          "word": "la",
          "definition": "the"
        },
        {
          "word": "leche",
          "definition": "foo"
        }
      ],
      "id": "fc0a3426d589",
      "priority": 1,
      "group": "7494acaa2312"
    },
    {
      "type": "listeningExercise",
      "answer": "foo",
      "meaning": "la leche",
      "audio": "839a0748c690b897cfed93808f446741c386ea9061cc6124e421d44218552e14",
      "id": "046f2b529b69",
      "priority": 1,
      "group": "7494acaa2312"
    }
  ]
}