text: {"answer": "bus", "query": "What vehicles are the boys riding?", "question_id": 98431001, "contrast_sets": [{"mutex_answer": "train", "mutex_caption": "a green and white train pulling up to a bus stop in a city", "mutex_detection": "train"}, {"mutex_answer": "trolley", "mutex_caption": "a green and white trolley pulling up to a bus stop in a city", "mutex_detection": "trolley"}, {"mutex_answer": "buggy", "mutex_caption": "a green and white buggy pulling up to a bus stop in a city", "mutex_detection": "buggy"}, {"mutex_answer": "streetcar", "mutex_caption": "a green and white streetcar pulling up to a bus stop in a city", "mutex_detection": "streetcar"}, {"mutex_answer": "scooter", "mutex_caption": "a green and white scooter pulling up to a bus stop in a city", "mutex_detection": "scooter"}], "caption": "a green and white bus pulling up to a bus stop in a city", "image_id": 98431, "detection": "bus", "boxes": [[25.6, 181.0, 35.95, 34.97], [152.57, 81.56, 399.17, 219.74], [70.44, 181.66, 60.34, 39.59]], "id": 526, "file_name": "COCO_val2014_000000098431.jpg", "coco_url": "http://images.cocodataset.org/val2014/COCO_val2014_000000098431.jpg", "flickr_url": "http://farm9.staticflickr.com/8113/8659862867_d7c900b7e8_z.jpg", "license": 5, "height": 427, "width": 640}