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#Update

After @unor answer I updated the <section id="article-section"> section as following:

 <main id="article-section" role="main">
 <article>
 <header id="article-head">
 <h1 id="article-title">TITLE</h1>
 <p id="article-author">Story by AUTHOR </p>
 </header>
 <article id="article-body">
 <p>a paragraph</p>
 <p>another paragraph</p>
 </article>
 <footer id="article-footer"> <!-- the same as above --></footer>
 </article>
 </main>

#Update

After @unor answer I updated the <section id="article-section"> section as following:

 <main id="article-section" role="main">
 <article>
 <header id="article-head">
 <h1 id="article-title">TITLE</h1>
 <p id="article-author">Story by AUTHOR </p>
 </header>
 <article id="article-body">
 <p>a paragraph</p>
 <p>another paragraph</p>
 </article>
 <footer id="article-footer"> <!-- the same as above --></footer>
 </article>
 </main>