anchor.diff:              </div>
               <footer>
                 <a href="/map" class="btn green medium">Open map</a>
  -              <small>Source: World Resources Institute</small>
               </footer>
             </div>
           </div>
  
positive.code:             </div>
              <footer>
                <a href="/countries" class="btn green medium">View countries</a>
                <small>Source: World Resources Institute</small>
              </footer>
            </div>
          </div>
  
negative.code:             </div>
              <footer>
                <a href="/sources" class="btn green medium">Browse data</a>
              </footer>
            </div>
          </div>
  