Nested <section>

<section id="content">
    <section class="post">
        <p>content</p>
        <section class="comments">
            <p>comments</p>
        </section>
    </section>
    <section class="post">
        <p>content</p>
        <section class="comments">
            <p>comments</p>
        </section>
    </section>
</section>