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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 _parse_entry(self):
 """Parse an entry."""

        entry_type = self._next_token().lower()
        if entry_type == 'string':
            self._parse_string()
        elif entry_type not in ['comment', 'preamble']:
            self._parse_record(entry_type)