anchor.diff:                <tr>
                   <td class="td-header">Landsat 8</td>
                   <td>USGS</td>
  -                <td>Landsat 8</td>
                   <td>15 m (pansharpened) for RGB, 30 m for other renderers</td>
                   <td>every 16 days</td>
  -                <td>January 2013</td>
  +                <td>March 2013</td>
                   <td>Global</td>
                 </tr>
                 <tr>
                   <td class="td-header">Sentinel-2A</td>
                   <td>ESA</td>
  -                <td>MSI</td>
                   <td>10 m</td>
                   <td>every 10 days</td>
  -                <td>October 2016</td>
  +                <td>June 2015</td>
                   <td>Global</td>
                 </tr>
               </tbody>
  
positive.code:               <tr>
                  <td class="td-header">Landsat 8</td>
                  <td>USGS</td>
                  <td>Landsat 8</td>
                  <td>15 m (pansharpened) for RGB, 30 m for other renderers</td>
                  <td>every 16 days</td>
                  <td>January 2013</td>
                  <td>Global</td>
                </tr>
                <tr>
                  <td class="td-header">Sentinel-2</td>
                  <td>ESA</td>
                  <td>MSI</td>
                  <td>10 m</td>
                  <td>every 10 days</td>
                  <td>October 2016</td>
                  <td>Global</td>
                </tr>
              </tbody>
  
negative.code:               <tr>
                  <th width="90px">Sensor</th>
                  <th>Owner</th>
                  <th>Resolution</th>
                  <th>Revisit Time</th>
                  <th>Minimum Date</th>
  