def get_bbox(element: dict) -> tuple:
    """Get a bounding box from a manga109 element.

    Args:
        element (dict): a manga element such as body, face, frame, and text

    Returns:
        tuple:
        a bounding box that comparises four integers -- (xmin, ymin, xmax, ymax)
    """
    bbox_attrs = ("@xmin", "@ymin", "@xmax", "@ymax")
    xmin, ymin, xmax, ymax = [element[attr] for attr in bbox_attrs]
    return (xmin, ymin, xmax, ymax)