text: {"answer": "bus", "query": "What kind of vehicle is this?", "question_id": 571384002, "contrast_sets": [{"mutex_answer": "train", "mutex_caption": "a small group of people that are in front of a train", "mutex_detection": "train"}, {"mutex_answer": "rv", "mutex_caption": "a small group of people that are in front of a rv", "mutex_detection": "rv"}, {"mutex_answer": "trolley", "mutex_caption": "a small group of people that are in front of a trolley", "mutex_detection": "trolley"}], "caption": "a small group of people that are in front of a bus", "image_id": 571384, "detection": "bus", "boxes": [[99.02, 198.04, 438.71, 272.31]], "id": 784, "file_name": "COCO_val2014_000000571384.jpg", "coco_url": "http://images.cocodataset.org/val2014/COCO_val2014_000000571384.jpg", "flickr_url": "http://farm9.staticflickr.com/8547/8940794809_1eee8c3cd3_z.jpg", "license": 2, "height": 612, "width": 612}