code: def extract_relevant_info(item):
          
          article = {
              'authors': item['article_author'],
              'date_download': item['download_date'],
              'date_modify': item['modified_date'],
              'date_publish': item['article_publish_date'],
              'description': item['article_description'],
              'filename': item['filename'],
              'image_url': item['article_image'],
              'language': item['article_language'],
              'localpath': item['local_path'],
              'title': item['article_title'],
              'title_page': ExtractedInformationStorage.ensure_str(item['html_title']),
              'title_rss': ExtractedInformationStorage.ensure_str(item['rss_title']),
              'source_domain': ExtractedInformationStorage.ensure_str(item['source_domain']),
              'text': item['article_text'],
              'url': item['url']
          }
  
          # clean values
          for key in article:
              value = article[key]
              if isinstance(value, str) and not value:
                  article[key] = None
  
          return article
docs: extracts from an item only fields that we want to output as extracted information
          :rtype: object
          :param item:
          :return: