title: Given only entity ID, how do I tell whether it is page/app/user?
body: <p>For example, if I am given ID <code>128740590570428</code> and query <a href="http://graph.facebook.com/128740590570428" rel="nofollow">http://graph.facebook.com/128740590570428</a>, how do I tell if this is a page, user or an app?</p>