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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 describe(self):
 """Describe the model."""

        result = "No description available"
        if self.description:
            result = "%s" % self.description
        else:
            if self.__doc__:
                s = []
                s += [self.__doc__.strip().replace('\n', '').
                      replace('    ', ' ')]
                result = '\n'.join(s)
        return result