public static function fetchDaleChallWordList()
    {
        if (is_array(self::$arrDaleChall)) {
            return self::$arrDaleChall;
        }

        // Fetch Dale-Chall Words
        $arrDaleChallWordList = array();
        include_once('resources/DaleChallWordList.php');
        self::$arrDaleChall = $arrDaleChallWordList;

        return $arrDaleChallWordList;
    }