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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 get_results_soup(self, year=None):
 """ ``get_soup`` on the results page. The page URL depends on the year. """

        if year is None:
            year = self.year
        year = YEARS.get(year, year)

        return self.get_soup(URLS['results'][year])