diff -r 3a50bdfb75a9 -r ba3309b2fd30 app/soc/models/response.py
--- a/app/soc/models/response.py	Fri Nov 21 08:38:53 2008 +0000
+++ b/app/soc/models/response.py	Fri Nov 21 08:41:23 2008 +0000
@@ -21,15 +21,14 @@
 ]
 
 
-import polymodel
-
 from google.appengine.ext import db
 
+import soc.models.linkable
 import soc.models.quiz
 import soc.models.user
 
 
-class Response(polymodel.PolyModel):
+class Response(soc.models.linkable.Linkable):
   """Model of a Response to a Quiz.
 
   A Response is the "collection point" for a set of specific Answers to the