diff --git a/plantStructC4.adoc b/plantStructC4.adoc
index 3ea038e..15db094 100644
--- a/plantStructC4.adoc
+++ b/plantStructC4.adoc
@@ -16,6 +16,8 @@ Shows the graphic form (png) below the text entry area
 
 image::images/simple-00.png[]
 
+Exercise 1: Add a reply from Alice to Bob
+
 - - -
 *Additional References*