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<table>   <caption>Filter table test</caption>   <thead>      <tr>         <th></th>       </tr>       <tr>          <td colspan="">             <form action="" method="POST">             <label for="filter">Filter: </label>             <input type="text" name="filter" id="filter">              <input type="submit" value="submit">             </form>          </td>       </tr>    </thead>    <tbody>      <tr>        <td></td>      </tr>   </tbody></table>