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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def extract(self, item):
 """Runs the HTML-response trough a list of initialized extractors, a cleaner and compares the results. :param item: NewscrawlerItem to be processed. :return: An updated NewscrawlerItem including the results of the extraction """


        article_candidates = []

        for extractor in self.extractor_list:
            article_candidates.append(extractor.extract(item))

        article_candidates = self.cleaner.clean(article_candidates)
        article = self.comparer.compare(item, article_candidates)

        item['article_title'] = article.title
        item['article_description'] = article.description
        item['article_text'] = article.text
        item['article_image'] = article.topimage
        item['article_author'] = article.author
        item['article_publish_date'] = article.publish_date
        item['article_language'] = article.language

        return item