title: Use Facebook API to list group members' join date and inviter
body: <p>I can use the Facebook Graph API to get a list of group members. The simplest way to do this is to go to the <a href="https://developers.facebook.com/tools/explorer" rel="noreferrer">Graph API Explorer</a> and do a GET request of the form <code>{group_id}/members</code>. Is there a way to similarly obtain the members' join date and who they were invited by?</p>
  
  <p>The <a href="https://developers.facebook.com/docs/reference/api/group/" rel="noreferrer">relevant Graph API doc</a> doesn't seem to mention it. But I know the information is stored by Facebook because it is possible to list all of the group members and their inviters through Facebook itself. Is there a way to get this information through the API?</p>
  
  <p>EDIT: Nothing in the FQL <a href="https://developers.facebook.com/docs/reference/fql/group/" rel="noreferrer">group</a> or <a href="https://developers.facebook.com/docs/reference/fql/group_member" rel="noreferrer">group_member</a> API either.</p>