text: {"answer": "green", "query": "What color is the train?", "question_id": 403862000, "contrast_sets": [{"mutex_answer": "black", "mutex_caption": "A black train engine with a face on it."}, {"mutex_answer": "green and black", "mutex_caption": "A green and black train engine with a face on it."}, {"mutex_answer": "gray", "mutex_caption": "A gray train engine with a face on it."}, {"mutex_answer": "blue", "mutex_caption": "A blue train engine with a face on it."}, {"mutex_answer": "silver", "mutex_caption": "A silver train engine with a face on it."}], "caption": "A green train engine with a face on it.", "image_id": 403862, "id": 546, "file_name": "COCO_val2014_000000403862.jpg", "coco_url": "http://images.cocodataset.org/val2014/COCO_val2014_000000403862.jpg", "flickr_url": "http://farm4.staticflickr.com/3689/9495382045_dcd4e43305_z.jpg", "license": 2, "height": 478, "width": 640}