XPATH: selecting text node with an embedded node

having the following XML code:


<div class="content">
<ul>
<li>
<b>Item model number:</b>
   FCC5302Q-2
</li>
</ul>

I used this xpath expression to select the li node text:


//*[contains(@class, "content")]//li[b/text()="item model number"]/text()

And for some reason it fails to pick the text of the li element. Where am I going wrong with this?