code: def clean(self, list_article_candidates):
          
          # Save cleaned article_candidates in results.
          results = []
  
          for article_candidate in list_article_candidates:
              article_candidate.title = self.do_cleaning(article_candidate.title)
              article_candidate.description = self.do_cleaning(article_candidate.description)
              article_candidate.text = self.do_cleaning(article_candidate.text)
              article_candidate.topimage = self.do_cleaning(article_candidate.topimage)
              article_candidate.author = self.do_cleaning(article_candidate.author)
              article_candidate.publish_date = self.do_cleaning(article_candidate.publish_date)
  
              results.append(article_candidate)
  
          return results
docs: Iterates over each article_candidate and cleans every extracted data.
  
          :param list_article_candidates: A list, the list of ArticleCandidate-Objects which have been extracted
          :return: A list, the list with the cleaned ArticleCandidate-Objects