Bootstrap Form Alignment

HTML

<script src="//netdna.bootstrapcdn.com/bootstrap/3.1.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap.min.css">
<div class="form-group">
  <label for="rg-from control-label col-md-2" style="float:left;">Ab: </label>
  <div class="col-md-2">
      <input type="text" id="rg-from" name="rg-from" value="" class="form-control" />
  </div>
    <label for="rg-to control-label col-md-2" style="float:left;">Bis: </label>
  <div class="col-md-2">
      <input type="text" id="rg-to" name="rg-to" value="" class="form-control" />
  </div>
    <input type="button" value="Clear" class="btn btn-default btn-clear" /> 
    <input type="submit" value="Los!" class="btn btn-primary" />
</div>
<!--<div class="form-group">
  <label for="rg-to control-label col-md-2">Bis: </label>
  <div class="col-md-2">
      <input type="text" id="rg-to" name="rg-to" value="" class="form-control" />
  </div>
</div>
 <div class="form-group">
    <input type="button" value="Clear" class="btn btn-default btn-clear" /> 
    <input type="submit" value="Los!" class="btn btn-primary" />
</div>-->