anchor.diff:    <tr>
       <td> <i>D. melanogaster</i> </td>
       <td> Experimentally determined 3-D structures</td>
  -    <td> <a href="http://www.rcsb.org/pdb/home/home.do" target="_new">PDB [Protein Data Bank]</a> - 21st April 2010</td>
  +    <td> <a href="http://www.rcsb.org/pdb/home/home.do" target="_new">PDB [Protein Data Bank]</a> - 10th November 2010</td>
       <td> &nbsp;</td>
       <td> &nbsp;</td>
     </tr>
  
positive.code:   <tr>
      <td> <i>S. cerevisiae</i> </td>
      <td> Gene versus publications</td>
      <td> <a href="http://www.ncbi.nlm.nih.gov" target="_new">NCBI</a> - 23rd April 2010</td>
      <td> &nbsp;</td>
      <td> &nbsp;</td>
    </tr>
  
negative.code:   <tr>
      <td> <i>C. elegans</i></td>
      <td> Gene versus publications</td>
      <td> <a href="http://www.ncbi.nlm.nih.gov" target="_new">NCBI</a> - 10th November 2010</td>
      <td> &nbsp;</td>
      <td> &nbsp;</td>
    </tr>
  