diff --git a/iap21.md b/iap21.md
index 018423da1..84a3c60eb 100644
--- a/iap21.md
+++ b/iap21.md
@@ -143,8 +143,9 @@
 - [[wikipedia]]
   - Possible [[root nodes]].
     - A [[root node]] in a subgraph is a good node from which with to optimally encode the surrounding space.
-  - [[meaning of life]]
-  - [[list of lists of articles]]
+    - [[meaning of life]]
+    - [[list of lists of articles]]
+    - [[wikipedia articles have many rankings]]
 
 [//begin]: # "Autogenerated link references for markdown compatibility"
 [underlay]: underlay "Underlay"