anchor.diff:          </div>
   
           <div class="col-sm-4">
  -          <%= pluralize sequence.children.length, "subsequence" %>
  +          <%= pluralize sequence.children.length, "subsequence" %>, <%= pluralize sequence.parents.length, "parents" %>
           </div>
         </div>
       <% end %>
  
positive.code:     </div>
    <% end %>
  </div>
  <div class="col-sm-3"></div>
  
negative.code: <%= title("Sequences ‧ #{@current_workspace.name}") %>
  
  <div class="col-sm-2"></div>
  <div class="col-sm-8">
    <% if @sequences.empty? %>
      <div class="row">
        <div class="col-sm-7 center">
  