title: Extract part of URL
body: <p>I have an URL and need to extract a part of it.</p>
  
  <p>The url is like this:<br />
  <code><a href="http://website.com/get.php?url=http://www.website2.com/index.html?articleID=123456" rel="nofollow noreferrer">http://website.com/get.php?url=http://www.website2.com/index.html?articleID=123456</a></code></p>
  
  <p>And I need to extract this part:<br />
  <code><a href="http://www.website2.com/index.html?articleID=123456" rel="nofollow noreferrer">http://www.website2.com/index.html?articleID=123456</a></code></p>
  
  <p>How would I do this in Objective-C?</p>