def _get_title_info(html, key):
    """Pulls title information for the regulation.

    Parameters
    ----------
    html : bs4.BeautifulSoupt
        The bs4 representation of the site
    key : str
        The last element of the class name for the div to target

    Returns
    -------
    title_info : str
        The relevant title information
    """
    div = html.find("div", {"id": f"ContentPlaceHolder1_div{key}"})
    return div.text if div else None