article-small.tpl.php

<div class="pure-g <?php print $classes;?>">
  
  <?php if ($left): ?>
    <div class="pure-u-1-2<?php print $left_classes; ?>">
      <?php print $left; ?>
    </div>
  <?php endif; ?>

  <?php if ($right): ?>
    <div class="pure-u-1-2<?php print $right_classes; ?>">
      <?php print $right; ?>
    </div>
  <?php endif; ?>
  
</div>