diff --git a/demos/index.html b/demos/index.html
index 757701815..7684e9344 100644
--- a/demos/index.html
+++ b/demos/index.html
@@ -26,6 +26,7 @@ Phrasebook</a>
 online</A>
  | <small><a href="minibar/minibar_offline.html">Minibar offline</a></small>
 
+<p><a href="http://www.grammaticalframework.org/~hallgren/Talks/GF/Tutorial2012/Ex4/answer.html">Question answering demo</a> for simple math questions.
 <P>
 <a href="http://www.grammaticalframework.org:41296/fridge">Fridge poetry</A>
  | <a href="http://www.grammaticalframework.org:41296/translate">Word-completing translator</A>