Here is the example:
<ul>
<li>list item one</li>
<li>list item two
<ol>
<li test="video">Nested item one</li>
<li test="audio">nested item two</li>
</ol>
<ol>
<li test="video">Nested item three</li>
</ol>
</li>
<li>list item three</li>
</ul>
If I only want to select the elements of <ol> which does not have child <li test="audio">, what's the CSS selector or XPath please?