<div class="row">
    <div class="col-xs-12  col-sm-6">
       [text* your-name placeholder "Ihr Name"] 
       [email* your-email placeholder "E-Mail Adresse"]
       [text your-subject placeholder "Betreff"]
    </div>
    <div class="col-xs-12  col-sm-6">
      [textarea your-message placeholder "Nachricht"]
      [submit class:btn class:btn-primary "SENDEN"]
    </div>
</div>