protected function html(Crawler $crawler, $removables = array())
    {
        $converter = new Converter;

        $html = trim($converter->convert($crawler->html()));

        foreach ((array) $removables as $keyword)
        {
            $html = str_replace($keyword, '', $html);
        }

        $html = str_replace('  ', ' ', (string) $html);

        return trim(preg_replace('/\s\s+/', "\n\n", $html));
    }