How to get elements before a tag in XPath?

Question

XPath

I have, for example, a sequence of tags

<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
<li><div><a>6</a></div></li>
<li>7</li>
<li>8</li>

How can I get only the lis that come before the tag containing the div/a?
Thank you.

Answer 1

//li[div/a]/preceding-sibling::li

Answer 2

(//li/div/a)[1]/../../preceding-sibling::li