["modality:image", "modality:text", "region:us"]
[{"name": "image", "dtype": "image"}, {"name": "image_id", "dtype": "int64"}, {"name": "objects", "sequence": [{"name": "id", "dtype": "int64"}, {"name": "area", "dtype": "float64"}, {"name": "bbox", "sequence": "float32", "length": 4}, {"name": "label", "dtype": {"class_label": {"names": {"0": "negative", "1": "positive"}}}}, {"name": "iscrowd", "dtype": "bool"}]}]