title: XPath Query to select hyperlink
body: <p>The following is a subset of xml from a twitter atom feed:</p>
  
  <pre><code>&lt;entry&gt;
      &lt;id&gt;tag:search.twitter.com,2005:18232030105964545&lt;/id&gt;
      &lt;published&gt;2010-12-24T09:10:29Z&lt;/published&gt;
      &lt;link type="text/html" rel="alternate" href="http://twitter.com/KTNKenya/statuses/18232030105964545"/&gt;
      &lt;title&gt;Synovate Poll: PM Raila Odinga remains the preffered presidential candidate at 42% while Uhuru Kenyatta is at 14%... http://fb.me/yjmMbmBx&lt;/title&gt;
      &lt;content type="html"&gt;Synovate Poll: PM &amp;lt;b&amp;gt;Raila&amp;lt;/b&amp;gt; Odinga remains the preffered presidential candidate at 42% while Uhuru Kenyatta is at 14%... &amp;lt;a href=&amp;quot;http://fb.me/yjmMbmBx&amp;quot;&amp;gt;http://fb.me/yjmMbmBx&amp;lt;/a&amp;gt;&lt;/content&gt;
      &lt;updated&gt;2010-12-24T09:10:29Z&lt;/updated&gt;
      &lt;link type="image/png" rel="image" href="http://a3.twimg.com/profile_images/701825859/NEW_KTN_normal.png"/&gt;
      &lt;google:location&gt;nairobi, kenya&lt;/google:location&gt;
      &lt;twitter:geo&gt;
      &lt;/twitter:geo&gt;
      &lt;twitter:metadata&gt;
          &lt;twitter:result_type&gt;recent&lt;/twitter:result_type&gt;
      &lt;/twitter:metadata&gt;
      &lt;twitter:source&gt;&amp;lt;a href=&amp;quot;http://www.facebook.com/twitter&amp;quot; rel=&amp;quot;nofollow&amp;quot;&amp;gt;Facebook&amp;lt;/a&amp;gt;&lt;/twitter:source&gt;
      &lt;twitter:lang&gt;en&lt;/twitter:lang&gt;
      &lt;author&gt;
          &lt;name&gt;KTNKenya (KTN Kenya)&lt;/name&gt;
          &lt;uri&gt;http://twitter.com/KTNKenya&lt;/uri&gt;
      &lt;/author&gt;
  &lt;/entry&gt;
  </code></pre>
  
  <p>From the <code>&lt;title&gt;...&lt;/title&gt;</code> element, i need to select the hyperlink <em>http://fb.me/yjmMbmBx</em> via an XPath query. How do I do it? Is it possible? 
  *I'm an XPath newbie.</p>
  
  <p>Thanks.</p>