app/views/popolo/organizations/index.html.erb
<% @organizations.group_by(&:classification).each do |classification,organizations| %>
<section>
<header>
<h1>
<%=t classification, count: organizations.size, scope: [:popolo, :organizations, :classifications], default: classification %>
</h1>
</header>
<ol>
<% organizations.each do |organization| %>
<li>
<%= link_to organization, organization %>
</li>
<% end %>
</ol>
</section>
<% end %>