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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 _split_url_string(query_string):
 """ Turns a `query_string` into a Python dictionary with unquoted values """

        parameters = parse_qs(to_utf8(query_string), keep_blank_values=True)
        for k, v in parameters.iteritems():
            parameters[k] = urllib.unquote(v[0])
        return parameters