diff --git a/source/part4.html.erb b/source/part4.html.erb
index c3fb71a..06e852c 100644
--- a/source/part4.html.erb
+++ b/source/part4.html.erb
@@ -120,6 +120,8 @@
 
 <% end %>
 
+<% partial 'partials/exercise', locals: { name: 'Bayesian networks: Earthquake (programming) (1p)' } do %>
+
 <p>
   Consider the following scenario. You live in an area where
   earthquakes happen on the average every 111th day. Another annoying
@@ -164,8 +166,6 @@
       it affect the variability?
   </ol>
 </p>
-
-<% end %>
   
 
 You can find the lecture slides for this part on the <a href="https://studies.helsinki.fi/courses/cur/hy-opt-cur-2021-3a70433a-d793-46a4-a43e-a42968419133">course homepage</a>
diff --git a/source/part5.html.erb b/source/part5.html.erb
index dac5ee2..5bb9958 100644
--- a/source/part5.html.erb
+++ b/source/part5.html.erb
@@ -89,7 +89,7 @@ under Materials.
   this part in the course to see if you'll be able to recognize some
   familiar features in it:
   <ul>
-    <li><a href="https://vimeo.com/13128413"</a>Vimeo: Terminator Salvation Machine Vision Montage</a>
+    <li><a href="https://vimeo.com/13128413"Vimeo: Terminator Salvation Machine Vision Montage</a>
   </ul>
 </p>