public function getIntroduction($ellipse = "...")
    {
        $intro = $this->internalGetIntroduction();

        if ($intro === null && ($copy = $this->getCopy()) !== null) {
            $copy = trim(strip_tags($this->getCopy()));

            if ( ! empty($copy)) {
                $intro = $this->truncateWords($copy, $ellipse);
            }
        }

        return $intro;
    }