text: {"answer": "suitcase", "query": "What is the person holding?", "question_id": 449191000, "contrast_sets": [{"mutex_answer": "camera", "mutex_caption": "A large man is holding a black camera.", "mutex_detection": "camera"}, {"mutex_answer": "backpack", "mutex_caption": "A large man is holding a black backpack.", "mutex_detection": "backpack"}, {"mutex_answer": "purse", "mutex_caption": "A large man is holding a black purse.", "mutex_detection": "purse"}, {"mutex_answer": "phone", "mutex_caption": "A large man is holding a black phone.", "mutex_detection": "phone"}], "caption": "A large man is holding a black suitcase.", "image_id": 449191, "detection": "suitcase", "boxes": [[1.44, 400.0, 121.08, 181.62], [185.53, 304.9, 162.51, 258.88], [346.61, 430.02, 66.15, 172.59], [252.78, 549.73, 78.25, 48.2]], "id": 317, "file_name": "COCO_val2014_000000449191.jpg", "coco_url": "http://images.cocodataset.org/val2014/COCO_val2014_000000449191.jpg", "flickr_url": "http://farm1.staticflickr.com/41/106849595_81c0712f7e_z.jpg", "license": 3, "height": 640, "width": 427}