public function checkPageSubjectInMetaDescription() {
        if ($this->checkPageSubjectDefined()) {

            if (preg_match('/' . preg_quote($this->owner->SEOPageSubject, '/') . '/i', $this->owner->MetaDescription)) {
                return true;
            }
            else {
                return false;
            }
        }
        return false;

    }