需要帮助选择PHP简单的HTML DOM解析器

Working on a community website, converting it from ASP to PHP. At the moment, the client manually enters the movie times each week for our local theater, which they grab from another website. I figured I would try to automate this process since we are redoing the site anyway, so I found PHP Simple HTML DOM Parser. I'm stuck on selecting the rating of the movie (PG, 18, etc).

Here is a div that includes the information for one movie:

            <div class="mshow">
                <span style="float:right; font-size:11px;">
                    <a href="/trailers/enders-game/19330/" title="enders-game movie trailer" style="font-size:11px;">Trailer</a> | 
                    <a href="/reviews/enders-game/30945/" title="Ender's Game movie reviews" style="font-size:11px;">Rating: </a>
                    <b>Tribute</b>
                    <img src="/images/stars/4_sm.gif" alt="Current rating: 3.88" border="0" />
                </span>
                <strong>
                    <a href="/movies/enders-game/30945/" title="Ender's Game movie info">Ender's Game</a>
                </strong>
                (PG)<br />
                <div class="block">&nbsp;</div>
                <div class="rsd">Fri, Nov 15: </div>
                <div class="rst" >7:00pm &nbsp;&nbsp;9:20pm &nbsp;&nbsp;</div><br />
                <div class="rsd">Sat, Nov 16: </div>
                <div class="rst" >1:00pm &nbsp;&nbsp;3:15pm &nbsp;&nbsp;7:00pm &nbsp;&nbsp;9:20pm &nbsp;&nbsp;</div><br />
                <div class="rsd">Sun, Nov 17: </div>
                <div class="rst" >1:00pm &nbsp;&nbsp;3:15pm &nbsp;&nbsp;7:00pm &nbsp;&nbsp;9:20pm &nbsp;&nbsp;</div><br />
                <div class="rsd">Mon, Nov 18: </div>
                <div class="rst" >7:00pm &nbsp;&nbsp;9:20pm &nbsp;&nbsp;</div><br />
                <div class="rsd">Tue, Nov 19: </div>
                <div class="rst" >7:00pm &nbsp;&nbsp;9:20pm &nbsp;&nbsp;</div><br />
                <div class="rsd">Wed, Nov 20: </div>
                <div class="rst" >7:00pm &nbsp;&nbsp;9:20pm &nbsp;&nbsp;</div><br />
                <div class="rsd">Thu, Nov 21: </div>
                <div class="rst" >7:00pm &nbsp;&nbsp;9:20pm &nbsp;&nbsp;</div><br />
            </div>

And here is my code so far:

            <?php
            include_once('../simple_html_dom.php');

            $html = file_get_html('http://www.tribute.ca/showtimes/theatres/may-cinema-6/mayc5/?datefilter=-1');
            $movies = array();
            foreach ($html->find("div.mshow") as $movie) {
                $item['trailer'] = $movie->find('a', 0)->href;
                $item['reviews'] = $movie->find('a', 1)->href;
                $item['link'] = $movie->find('a', 2)->href;
                $item['title'] = $movie->find('a', 2)->plaintext;
                $movies[] = $item;
            }

            var_dump($movies);
            ?>

I can't figure out how to grab (PG). Any suggestions?

Edit: This works, but doesn't seem like a great solution.

            function parseDOM($url) {
                $movies = array();
                foreach ($url->find("div.mshow") as $movie) {
                    $item['trailer'] = $movie->find('a', 0)->href;
                    $item['reviews'] = $movie->find('a', 1)->href;
                    $item['link'] = $movie->find('a', 2)->href;
                    $item['title'] = $movie->find('a', 2)->plaintext;
                    $info = $movie->plaintext;
                    preg_match('/\((.*?)\)/', $info, $matches);
                    $item['rating'] = $matches[1];
                    $movies[] = $item;
                }
                return $movies;
            }