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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 to_text_format(self):
        '''Format as detached DNS information as text.'''
        return '\n'.join(itertools.chain(
            (self.fetch_date.strftime('%Y%m%d%H%M%S'), ),
            (rr.to_text() for rr in self.resource_records),
            (),
        ))