old_contents: 'use strict';
  
  app.factory('Comment', function(FURL, $firebase) {
  
  	var ref = new Firebase(FURL);
  	
  });
new_contents: 'use strict';
  
  app.factory('Comment', function(FURL, $firebase) {
  
  	var ref = new Firebase(FURL);
  
  	var Comment = {
  
  	};
  
  });
subject: add Comment object