title: Do combination OR and AND statements work with Facebook's FQL?
body: <p>I'm attempting to execute a semi-advanced query using Facebook's FQL. </p>
  
  <pre><code>SELECT message FROM stream WHERE actor_id= userid_1 AND source_id=userid_2 OR actor_id=userid_2 AND source_id=userid_1
  </code></pre>
  
  <p>Everytime I run it though, it comes up blank, even though there are posts between the two users on their walls, so this possible or do I need to use some sort of alternative method?</p>