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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 _extract_meta_value(self, tag):
 # type: (str, List[str]) -> str """Find a target value by `tag` from given meta data. :param tag: str :param meta_data: list :return: str """

        try:
            return [l[len(tag):] for l in self.meta_data if l.startswith(tag)][0]
        except IndexError:
            return '* Not Found *'