*  @return the title of the page
     *  @throws IOException if a network error occurs
     *  @since 0.13
     */
    public String random(int... ns) throws IOException
    {
        // fetch
        StringBuilder url = new StringBuilder(query);
        url.append("list=random");
        constructNamespaceString(url, "rn", ns);
        String line = fetch(url.toString(), "random");
        return parseAttribute(line, "title", 0);
    }