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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 parse(self, response):
 """ Passes the response to the pipeline. :param obj response: The scrapy response """

        if not self.helper.parse_crawler.content_type(response):
            return

        yield self.helper.parse_crawler.pass_to_pipeline(
            response,
            self.helper.url_extractor.get_allowed_domain(response.url)
        )