Nyeste indlæg fra 2 tabeller (MySQL)

Hvordan for jeg vist forum_question.Title som passer med forum_comment.ID

>---------------- SQL ---------------------<
CREATE TABLE `forum_question` (
  `ID` int(11) NOT NULL auto_increment,
  `Datenum` int(10) NOT NULL default '0',
  `Title` varchar(100) NOT NULL default '',
  `Category` int(11) NOT NULL default '0',
  `Username` varchar(15) NOT NULL default '',
  `Question` text NOT NULL,
  PRIMARY KEY  (`ID`)
) TYPE=MyISAM;


CREATE TABLE `forum_comment` (
  `ID` int(11) NOT NULL default '0',
  `Datenum` int(10) NOT NULL default '0',
  `Username` varchar(15) NOT NULL default '',
  `Comment` text NOT NULL
) TYPE=MyISAM;
>---------------- SQL ---------------------<

<?
  $sqlstring = "SELECT DISTINCT forum_comment.ID FROM forum_comment, forum_question ORDER BY forum_comment.Datenum DESC LIMIT 5;";
?>
<table border="0" width="100%" cellpadding="1" cellspacing="1">
  <?
    $query = mysql_query($sqlstring);
    while($row = mysql_fetch_array($query)) {
        echo '<tr>';
        echo '<td>'.$row["ID"]." - ".$row["Title"].'</td>';
        echo '</tr>';
    }
  ?>
</table>