def get_parent_assessment_part_query(self):
raise errors.Unimplemented()<EOL>
Gets the query for an assessment part.

        Multiple retrievals produce a nested ``OR`` term.

        return: (osid.assessment.authoring.AssessmentPartQuery) - the
                assessment part query
        raise:  Unimplemented -
                ``supports_parent_assessment_part_query()`` is ``false``
        *compliance: optional -- This method must be implemented if
        ``supports_parent_assessment_part_query()`` is ``true``.*