title: Exclude certain sites when using a label in Google Custom Search
body: <p>I'm implementing Google Custom Search on a site I'm working on.</p>
  
  <p>The website is divided in subsites, with a parent site. It's done like this:</p>
  
  <pre><code> - parentsite.com
    - parentsite.com/childsite1
    - parentsite.com/childsite2
    - parentsite.com/childsite3
    - parentsite.com/childsite4
  </code></pre>
  
  <p>When searching the site, I want the users to be able to filter out the results for each child site, and this I've done with refinement labels (so when you press the <code>Childsite 1</code> label, you will only get results from <code>parentsite.com/childsite1/*</code>)</p>
  
  <p><strong>My question is:</strong> I also want a label that <strong>only gives the user results from the parent site</strong>, but not from any of the child sites. Can I in some way also make the refinement label <em>exclude</em> certain url patterns?</p>