title: How to find Facebook group id by name
body: <p>I have a Facebook application, which I would like to be able to read facebook group feeds.
  I have a user-input feed url, that looks like this: <a href="http://www.facebook.com/groups/music.sharing/" rel="noreferrer">http://www.facebook.com/groups/music.sharing/</a></p>
  
  <p>To access the feed though, I can only use its id, like this: <a href="http://graph.facebook.com/[id" rel="noreferrer">http://graph.facebook.com/[id</a> of group]/feed</p>
  
  <p>I cannot find anything for that in the reference, FQL doesn't allow querying by name so .. I'm stuck. Any ideas ?</p>
  
  <p>Thanks!</p>