title: AJAX HTML data is ok, but find returns null
body: <p>I'm fetching an HTML document with $.get (tried $.ajax as well):</p>
  
  <pre><code>$.get('/products/', function(data) {
      $('.content .article').remove();
      $('.content').prepend($(data).find('.article'));
  });
  </code></pre>
  
  <p>Checked if data is ok with:</p>
  
  <pre><code>alert(data);
  </code></pre>
  
  <p>And It prints the html file with no problem. But when I try to print:</p>
  
  <pre><code>alert($(data).find('.article').html());
  </code></pre>
  
  <p>or</p>
  
  <pre><code>alert($('.article', data).html());
  </code></pre>
  
  <p>It always prints null.</p>
  
  <p>I found a similiar problem here: <a href="https://stackoverflow.com/q/2137811">Extract part of HTML document in jQuery</a>, but the solutions didn't work for me.</p>
  
  <p>EDIT:
  Content o generated HTML.</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html&gt;&lt;head&gt;&lt;/head&gt;&lt;body&gt;
  
  &lt;div class="article"&gt;&lt;h1&gt;Lorem Ipsum&lt;/h1&gt;
  &lt;p&gt;Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.&lt;/p&gt;
  &lt;/div&gt;
  
  &lt;/body&gt;&lt;/html&gt;
  </code></pre>