{
    "name": "Anglo-Saxon stone cross",
    "short_name": "AScross",
    "thumbnail": "https://www.flickr.com/photos/micropasts/15927985104/sizes/q/",
    "description": "Photo masking application",
    "question": "Draw the outline and/or holes of the main object in the picture"
}

{
    "name": "Anglo-Saxon stone cross",
    "short_name": "AScross",
    "thumbnail": "https://farm8.staticflickr.com/7351/15927985104_7572500bce_q.jpg",
    "description": "Photo masking application",
    "question": "Draw the outline and/or holes of the main object in the picture"
}

Correct image url for thumbnail
Correct image url for thumbnail