anchor.diff:      </td>
     </tr>
     <tr>
  -    <td colspan="2">
  +    <td valign="top">
         <div class="heading2">
           Minor datasets
  +      </div>
  +    </td>
  +    <td valign="top">
  +      <div class="heading2">
  +        Dataset links
         </div>
       </td>
     </tr>
  
positive.code: 
  <table>
    <tr>
      <td valign="top" colspan="2">
        <div class="heading2">
          Major genome datasets
        </div>
      </td>
    </tr>
  
negative.code:         </dl>
        </div>
      </td>
      <td width="4%" valign="top">
        <div class="body">
          <ul>
            <li>
  