diff --git a/doc/src/CNN/cnn.do.txt b/doc/src/CNN/cnn.do.txt
index bc992de48..1c8957c2f 100644
--- a/doc/src/CNN/cnn.do.txt
+++ b/doc/src/CNN/cnn.do.txt
@@ -10,7 +10,7 @@ DATE: today
 * add more elaborated examples
 * update keras codes and think of pytorch examples?
 * Example on pollen cases  https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0229751
-
+* Example on nuclear physics experiments
 !split
 ===== Convolutional Neural Networks (recognizing images) =====