protected function _addSurveyAnswersToExportModel(\MUtil_Model_ModelAbstract $model, \Gems_Tracker_Survey $survey, array $data, array &$prefixes)
    {
        $prefixes['A'] = [];
        $language = $this->locale->getLanguage();
        $questions = $survey->getQuestionList($language);
        $questionInformation = $survey->getQuestionInformation($language);
        foreach($questions as $questionName => $label) {
            if ($parent = $model->get($questionName, 'parent_question')) {
                if ($model->get($parent, 'type') === \MUtil_Model::TYPE_NOVALUE) {
                    if (isset($data['subquestions']) && $data['subquestions'] == 'prefix_child') {
                        $cleanLabel = strip_tags($label);
                        $model->set($questionName, 'label', $cleanLabel);                        
                    }
                    if (isset($data['subquestions']) && $data['subquestions'] == 'show_parent') {
                        if (!in_array($parent, $prefixes['A'])) {
                            $prefixes['A'][] = $parent;
                            if (isset($questionInformation[$parent], $questionInformation[$parent]['question'])) {
                                $cleanLabel = strip_tags($questionInformation[$parent]['question']);
                                $model->set($parent, 'label', $cleanLabel);
                            }
                        }
                    } else {
                        $model->remove($parent, 'label');
                    }
                }
            }

            if ($question = $model->get($questionName, 'survey_question') && $model->get($questionName, 'label') == null) {
                $model->set($questionName, 'label', $questionName);
                if (isset($questionInformation[$questionName], $questionInformation[$questionName]['question'])) {
                    $cleanLabel = strip_tags($questionInformation[$questionName]['question']);
                    $model->set($questionName, 'label', $cleanLabel);
                }
            }
            $prefixes['A'][] = $questionName;
        }
    }