w show-grid">
        <div class="col-xs-8 col-sm-6">
          Level 2: .col-xs-8 .col-sm-6
        </div>
        <div class="col-xs-4 col-sm-6">
          Level 2: .col-xs-4 .col-sm-6
        </div>
      </div>
    </div>
  </div>
{% highlight html %}
<div class="row">
  <div class="col-sm-9">
    Level 1: .col-sm-9
    <div class="row">
      <div class="col-xs-8 col-sm-6">
        Level 2: .col-xs-8 .col-sm-6
      </div>
      <div class="col-xs-4 col-sm-6">
        Level 2: .col-xs-4 .col-sm-6
     