diff --git a/TUTORIAL.org b/TUTORIAL.org
index af1568b..5370faa 100644
--- a/TUTORIAL.org
+++ b/TUTORIAL.org
@@ -251,7 +251,7 @@ No, it's better to be able to have a separate type:
 @"Not sure about exact date..."
 {"name": "Gregor Samsa",
  "description": "humanoid trapped in an insect body",
- "born": "Sometime in October 1915?  Or was that when he became an insect?"}
+ "born": <Unknown "Sometime in October 1915?  Or was that when he became an insect?">}
 #+END_SRC
 
 Now we can distinguish the two.