text: {"answer": "horses", "query": "What type of animals are walking by?", "question_id": 505650006, "contrast_sets": [{"mutex_answer": "donkeys", "mutex_caption": "Two men are riding donkeys around an arena.", "mutex_detection": "donkey"}, {"mutex_answer": "elk", "mutex_caption": "Two men are riding elks around an arena.", "mutex_detection": "elk"}], "caption": "Two men are riding horses around an arena.", "image_id": 505650, "detection": "horse", "boxes": [[145.89, 334.03, 96.35, 242.24], [272.36, 316.77, 116.37, 285.57]], "id": 946, "file_name": "COCO_val2014_000000505650.jpg", "coco_url": "http://images.cocodataset.org/val2014/COCO_val2014_000000505650.jpg", "flickr_url": "http://farm3.staticflickr.com/2849/8758632636_a388c29771_z.jpg", "license": 1, "height": 640, "width": 429}