@abc.abstractmethod<EOL><INDENT>def get_assessment_part(self):<DEDENT>
return<EOL>
Gets the parent assessment.

        :return: the parent assessment part
        :rtype: ``osid.assessment.authoring.AssessmentPart``
        :raise: ``IllegalState`` -- ``has_parent_part()`` is ``false``
        :raise: ``OperationFailed`` -- unable to complete request

        *compliance: mandatory -- This method must be implemented.*