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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 _select(self, pointer):
 """ Get a YAMLChunk referenced by a pointer. """

        return YAMLChunk(
            self._ruamelparsed,
            pointer=pointer,
            label=self._label,
            strictparsed=self._strictparsed,
            key_association=copy(self._key_association),
        )