Retain order of elements using different selectors with puppeteer on a page with a flat structure

I have a page with a flat structure where the order the elements appear on the page defines the structure I need to maintain when saving the data.


<h3 class="'group">Furniture</h3>
<h4 class="category">Office</h4>
<ul>
  <li>Desk</li>
  <li>Chairs</li>
</ul>
<h4 class="category">Home</h4>
<ul>
  <li>Couches</li>
  <li>Tables</li>
  <li>Bookshelves</li>
</ul>
<h4 class="category">Outdoor</h4>
<ul>
  <li>Shade Umbrellas</li>
</ul>
</div>
<h3 class="'group">Toys</h3>
<h4 class="category">Toddlers</h4>
<h4 class="category">Kids</h4>
<ul>
  <li>Balls</li>
  <li>Dolls</li>
</ul>

There are enough good query selectors for me to pull everything I need from the page, but I can't figure out how to tell puppeteer to organize categories by groups and li elements by categories.

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