<html>
   <head>
      <title>Grouping By Key</title>
   </head>
   <body>
      <table>
         <tr>
            <th>Position</th>
            <th>Country</th>
            <th>City List</th>
         </tr>
         <tr>
            <td>1</td>
            <td>Italia</td>
            <td>Milano, Venezia</td>
         </tr>
         <tr>
            <td>2</td>
            <td>France</td>
            <td>Paris, Lyon</td>
         </tr>
         <tr>
            <td>3</td>
            <td>Deutschland</td>
            <td>München</td>
         </tr>
      </table>
   </body>
</html>