anchor.diff:    <tr>
       <td> <i>D. melanogaster</i> </td>
       <td> Transcription factor binding sites</td>
  -    <td> <a href="http://www.flyreg.org" target="_new" class="extlink">REDfly</a> - 12 Feb 2013</td>
  +    <td> <a href="http://www.flyreg.org" target="_new" class="extlink">REDfly</a> - 11th Jul 2013</td>
       <td> Bergman et al - <a href="http://www.ncbi.nlm.nih.gov/pubmed/15572468" target="_new" class="extlink">PubMed: 15572468</a></td>
       <td>  &nbsp; </td>
     </tr>
  
positive.code:        <p><i>C. elegans</i></p>
      </td>
      <td> Gene versus publications</td>
      <td> <a href="http://www.ncbi.nlm.nih.gov" target="_new" class="extlink">NCBI</a> - 18 Apr 2013</td>
      <td> &nbsp;</td>
      <td> &nbsp;</td>
    </tr>
  
negative.code:   <tr>
      <td> <i>D. melanogaster</i> </td>
      <td> High-throughput cell-based RNAi screens</td>
      <td> <a href="http://genomernai.org" target="_new" class="extlink">GenomeRNAi</a> - Version 11.0</td>
      <td> Schmidt et al - <a href="http://www.ncbi.nlm.nih.gov/pubmed/23193271" target="_new" class="extlink">PubMed: 23193271
  </a></td>
      <td> &nbsp;</td>
    </tr>
    <tr>
  