Header text, ignored.

<div class=article>

<h1 id=first>First Heading</h1>

Section 1.

<h2 id=second>Second
Heading</h2>

<b>Section 2.</b>

<h3 id=third>Third Heading</h3>

Section 3.
Multiple lines.

<h2 id=fourth>Fourth Heading</h2>

Section 4.

</div>

Extra footer text, ignored.