public Document HTMLGetRankedNamedEntities(String html, String url, AlchemyAPI_NamedEntityParams params)
        throws IOException, SAXException,
               ParserConfigurationException, XPathExpressionException
    {
        CheckHTML(html, url);
        
        params.setUrl(url);
        params.setHtml(html);

        return POST("HTMLGetRankedNamedEntities", "html", params);
    }