<% content_for :title do %><%= @presenter.title %><% end %>
<section id="content"<% if @presenter.started? %> class="smart-answer-questions group"<% end %>>
  <%= render partial: "content" %>
</section>

<% content_for :title do %><%= @presenter.title %><% end %>
<main id="content" role="main" <% if @presenter.started? %> class="smart-answer-questions group"<% end %>>
  <%= render partial: "content" %>
</main>

Replace sections with role=main with main element
Replace sections with role=main with main element
