Selection of an a specific <li> in nested unordered lists

Question

would like to select all list elements that do not have a nested list under them (could be in any order, so next necessary the first or last).

In the case below it would be the one that reads:

<li>Main Item Three</li>

I'm able to select those list elements that do have a nested list:

$('ul.location_list li:has(ul)')

Figured I could use something like:

$('ul.location_list li:not(ul)')

But no dice. Thoughts?

<li>Main Item Three</li>

<ul class="location_list">
   <li>Main Item One
      <ul>
         <li>Sub-Item One A</li>
         <li>Sub-Item One B</li>
         <li>Sub-Item One B</li>
      </ul>
   </li>
   <li>Main Item Two
      <ul>
         <li>Sub-Item Two A</li>
         <li>Sub-Item Two B</li>
         <li>Sub-Item Two B</li>
      </ul>
   </li>
   <li>Main Item Three</li>
</ul>

Answer 1

$('ul.location_list>li:not(:has(ul))')

(untested :)