title: Get the elements that have children b or c
body: <p>Here is a sample of the XML I'm looking at:</p>
  
  <pre><code>    &lt;m&gt;
         &lt;b name = "b1"&gt;&lt;/b&gt;
         &lt;c name = "c1"&gt;&lt;/c&gt;
         &lt;d name = "d1"&gt;&lt;/d&gt;
      &lt;/m&gt;
      &lt;n&gt;
         &lt;b name = "b2"&gt;&lt;/b&gt;
         &lt;c name = "c2"&gt;&lt;/c&gt;
      &lt;/n&gt;
  </code></pre>
  
  <p>I would like to load all the elements that has children b or c . </p>
  
  <p>Basically, the elements form  ".//b"  and elements from  ".//c"</p>