text: {"answer": "bus", "query": "What type of big vehicle is shown in this picture?", "question_id": 543551001, "contrast_sets": [{"mutex_answer": "train", "mutex_caption": "A double-decker train near a waterway and a bridge. "}, {"mutex_answer": "van", "mutex_caption": "A double-decker van near a waterway and a bridge. ", "mutex_detection": "van"}, {"mutex_answer": "boat", "mutex_caption": "A double-decker boat near a waterway and a bridge. ", "mutex_detection": "boat"}, {"mutex_answer": "bike", "mutex_caption": "A double-decker bike near a waterway and a bridge. ", "mutex_detection": "bike"}, {"mutex_answer": "car", "mutex_caption": "A double-decker car near a waterway and a bridge. ", "mutex_detection": "car"}], "caption": "A double-decker bus near a waterway and a bridge. ", "image_id": 543551, "detection": "bus", "boxes": [[291.19, 190.09, 101.54, 133.65]], "id": 1276, "file_name": "COCO_val2014_000000543551.jpg", "coco_url": "http://images.cocodataset.org/val2014/COCO_val2014_000000543551.jpg", "flickr_url": "http://farm4.staticflickr.com/3082/2633159926_5cd8a126a6_z.jpg", "license": 1, "height": 333, "width": 500}