protected function get_responses_for_external($row) {
        $responses = [];
        foreach ($row as $el => $val) {
            // Get id from column name.
            if (preg_match('/^val(\d+)$/', $el, $matches)) {
                $id = $matches[1];

                $responses[] = [
                    'id' => $id,
                    'name' => $this->headers[$this->columns[$el]],
                    'printval' => $this->other_cols($el, $row),
                    'rawval' => $val,
                ];
            }
        }
        return $responses;
    }