text: {"answer": "boat", "query": "What is the man on?", "question_id": 508101016, "contrast_sets": [{"mutex_answer": "sledge", "mutex_caption": "a man is standing at the back of a sledge", "mutex_detection": "sledge"}], "caption": "a man is standing at the back of a boat", "image_id": 508101, "detection": "boat", "boxes": [[60.37, 259.76, 369.25, 74.32]], "id": 692, "file_name": "COCO_val2014_000000508101.jpg", "coco_url": "http://images.cocodataset.org/val2014/COCO_val2014_000000508101.jpg", "flickr_url": "http://farm8.staticflickr.com/7353/9665266176_774de49912_z.jpg", "license": 4, "height": 480, "width": 640}