def METHOD_NAME(self, index):
    """Returns the original annotation of image at index
    eg: ['001718', [[xmin, ymin, xmax, ymax, label_ind], ... ]]
    """
    img_path = list(self.annotation.keys())[index]
    return img_path[img_path.rfind("/") + 1 : img_path.rfind(".")], self.annotation[img_path]