text: {"answer": "blue", "query": "What color is the train?", "question_id": 521874001, "contrast_sets": [{"mutex_answer": "blue and gray", "mutex_caption": "A small blue and gray train traveling past houses by train tracks.."}, {"mutex_answer": "red", "mutex_caption": "A small red train traveling past houses by train tracks.."}, {"mutex_answer": "white", "mutex_caption": "A small white train traveling past houses by train tracks.."}], "caption": "A small blue train traveling past houses by train tracks..", "image_id": 521874, "id": 872, "file_name": "COCO_val2014_000000521874.jpg", "coco_url": "http://images.cocodataset.org/val2014/COCO_val2014_000000521874.jpg", "flickr_url": "http://farm3.staticflickr.com/2860/9502991381_52cd6614f1_z.jpg", "license": 3, "height": 428, "width": 640}