kc3-lang/kc3

diff --git a/doc/1_KC3/1.11_Call.en.md b/doc/1_KC3/1.11_Call.en.md
index bb1609f..bed3c2e 100644
--- a/doc/1_KC3/1.11_Call.en.md
+++ b/doc/1_KC3/1.11_Call.en.md
@@ -1,6 +1,10 @@
 # 1.11 Call
 
-## Examples
+A function or operator call has type `Call` in KC3. To produce it
+you need to quote a call or call a cfn that returns a `Call`, like
+`Tag.from_str`.
+
+## 1.11.1 Examples
 
 ```elixir
 ikc3> type(quote 1 + 1)