Wie kann ich über MagpieRSS den Autor anzeigen?

<?php
require_once('../magpierss/rss_fetch.inc');
?>




<?php
 $rss_url = 'http://www.sgcastrop.de/wordpress/?cat=3&feed=rss2';
 $my_rss = fetch_rss($rss_url);
 $my_rss_items = array_slice($my_rss->items, 0, 6);
?>


<br>
<b><font size="-1">1.Mannschaft</font></b><br>
<dl>
 <?php
 foreach ($my_rss_items as $item) {
 $title = $item['title'];
 $url = $item['link'];
 $description = $item['description'];
 $date = substr($item[pubdate], 5, 12);
[B] $author = $item['dc:creator'];[/B]


 if($title)
        {
                if (strlen($title) >= 100)
                {
                        $title = substr($title,0,99)."...";
                }
        }


 ?>




 <dt><?php print"$date"; ?>: <a href="<?php print"$url"; ?>"><?php print"$title"; ?></a>
<i>von [B]<?php print"$author"; ?>[/B]</i></dt>
 <?php
 }
 ?>