The markup of each subheader is found under the </header> element

The news.html page doesn’t have a background image so it has the following markup

<div class="ag-subheader">
  <div class="subheader-container">
   <div class="media-container-title txt-center">
    <h1 class="title-dark">News
    </h1>
   </div>
  </div>

 <div class="ag-mask">
   <div class="skew-mask skew-mask--color">
   </div>
 </div>
</div><!--end subheader-->

The article.html page has an empty subheader

<div class="ag-subheader--article">
</div>