1 files changed, 2 insertions, 3 deletions
diff --git a/README.md b/README.md
index 39f481b..757d1d0 100644
--- a/README.md
+++ b/README.md
@@ -653,12 +653,11 @@ In interaction rules, attributes are recognised by a modifier `int` in order to
 
 
 - Example: Duplicator of integer lists. 
-  
-  We note that, at the first line of the below example, the rule is allowed to have not twice occurrences of *i* (here, it is three times) because the *i* is a variable for attributes:
 
   ![dup_list](pic/dup_list.png)
   
-  
+  We note that, in the first line from the top of the following execution example, there is a rule allowed to have not twice occurrences of *i* (here, it is three times, that is, once in left-hand side, and twice in the right-hand side). This is because the *i* is a variable for attributes.
+
   ```
   >>> dup(a1,a2) >< (int i):xs => a1~(i:xs1), a2~(i:xs2), dup(xs1,xs2)~xs;
   >>> dup(a1,a2) >< []         => a1~[], a2~[];