def from_html(html, url=None, download_date=None):
        """
        Extracts relevant information from an HTML page given as a string. This function does not invoke scrapy but only
        uses the article extractor. If you have the original URL make sure to provide it as this helps NewsPlease
        to extract the publishing date and title.
        :param html:
        :param url:
        :return:
        """
        extractor = article_extractor.Extractor(
            ['newspaper_extractor', 'readability_extractor', 'date_extractor', 'lang_detect_extractor'])

        title_encoded = ''.encode()
        if not url:
            url = ''

        # if an url was given, we can use that as the filename
        filename = urllib.parse.quote_plus(url) + '.json'

        item = NewscrawlerItem()
        item['spider_response'] = DotMap()
        item['spider_response'].body = html
        item['url'] = url
        item['source_domain'] = urllib.parse.urlparse(url).hostname.encode() if url != '' else ''.encode()
        item['html_title'] = title_encoded
        item['rss_title'] = title_encoded
        item['local_path'] = None
        item['filename'] = filename
        item['download_date'] = download_date
        item['modified_date'] = None
        item = extractor.extract(item)

        tmp_article = ExtractedInformationStorage.extract_relevant_info(item)
        final_article = ExtractedInformationStorage.convert_to_class(tmp_article)
        return final_article
Extracts relevant information from an HTML page given as a string. This function does not invoke scrapy but only
        uses the article extractor. If you have the original URL make sure to provide it as this helps NewsPlease
        to extract the publishing date and title.
        :param html:
        :param url:
        :return: