text: {"answer": "grinding", "query": "What is the trick the skateboarder is doing called?", "question_id": 210749000, "contrast_sets": [{"mutex_answer": "jump", "mutex_caption": "a person riding a skate board jumping over a rail"}, {"mutex_answer": "flip", "mutex_caption": "a person riding a skate board flipping on a rail"}, {"mutex_answer": "wheelie", "mutex_caption": "a person riding a skate board doing a wheelie on a rail"}, {"mutex_answer": "handstand", "mutex_caption": "a person riding a skate board doing a handstand on a rail"}], "caption": "a person riding a skate board grinding down a rail", "image_id": 210749, "id": 888, "file_name": "COCO_val2014_000000210749.jpg", "coco_url": "http://images.cocodataset.org/val2014/COCO_val2014_000000210749.jpg", "flickr_url": "http://farm5.staticflickr.com/4064/5073960523_d526336526_z.jpg", "license": 2, "height": 640, "width": 457}