def _xml_tag_filter(s: str, strip_namespaces: bool) -> str:
    """
    Returns tag name and optionally strips namespaces.
    :param s: Tag name
    :param strip_namespaces: Strip namespace prefix
    :return: str
    """
    if strip_namespaces:
        ns_end = s.find("}")
        if ns_end != -1:
            s = s[ns_end + 1 :]
        else:
            ns_end = s.find(":")
            if ns_end != -1:
                s = s[ns_end + 1 :]
    return s