ia; gyroscope; picture-in-picture" allowfullscreen>
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<div id="summary-and-future" class="section level2" number="23.7">
<h2><span class="header-section-number">23.7</span> Summary and future</h2>
<iframe width="560" height="315" src="https://www.youtube.com/embed/eUhNBptlL58" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen>
</iframe>

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            </section>

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