<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _parse(self, chord):
 """ parse a chord :param str chord: Name of chord. """

        root, quality, appended, on = parse(chord)
        self._root = root
        self._quality = quality
        self._appended = appended
        self._on = on