anchor.diff:          <div class='source_table'>
             <dl class='sources_row'>
               <dt>Function</dt>
  -            <dd>Displays the extent of tree cover as defined by percent tree cover canopy density</dd>
  +            <dd>Identifies areas of tree cover</dd>
             </dl>
             <dl class='sources_row even'>
               <dt>Resolution/scale</dt>
  
positive.code:       <div class='source_header'>
          <strong class='source_title'>University of Maryland/Google tree cover loss</strong>
          <i class='expand_arrow'></i>
          <em class='source_description'>(annual &amp; 12 years, 30m, global)</em>
        </div>
  
        <div class='source_body'>
  
negative.code:           </dl>
            <dl class='sources_row even'>
              <dt>Date of content</dt>
              <dd>2001–2012</dd>
            </dl>
            <dl class='sources_row'>
              <dt>Tree cover canopy density</dt>
  