<hgroup> HTML heading group element

<hgroup>
  <h1>Frankenstein</h1>
  <p>Or: The Modern Prometheus</p>
</hgroup>
<p>
  Victor Frankenstein, a Swiss scientist, has a great ambition: to create
  intelligent life. But when his creature first stirs, he realizes he has made a
  monster. A monster which, abandoned by his master and shunned by everyone who
  sees it, follows Dr Frankenstein to the very ends of the earth.
</p>

hgroup {
  text-align: right;
  padding-right: 16px;
  border-right: 10px solid #00c8d7;
}

hgroup h1 {
  margin-bottom: 0;
}

hgroup p {
  margin: 0;
  font-weight: bold;
}

<!doctype html>
<title>HTML Standard</title>
<body>
  <hgroup id="document-title">
    <h1>HTML: Living Standard</h1>
    <p>Last Updated 12 July 2022</p>
  </hgroup>
  <p>Some intro to the document.</p>
  <h2>Table of contents</h2>
  <ol id="toc">
    …
  </ol>
  <h2>First section</h2>
  <p>Some intro to the first section.</p>
</body>